After 20 minutes Yamamoto finished reading the manual, it was longer and more detailed than expected, he felt that spending 3,000 merit points was not so bad, and he could use it for other people in the future.
This manual had several training methods for different situations, in one place there was training based on someone beginner who has no or little Spiritual Power, and on the other hand training for an intermediate/advanced person.
Yamamoto as he had very little Spiritual Power decided to start with the beginner's method called, "Awakening the Inner Spirit". This method is divided into 5 phases and if you want to use any basic Kidō spells you must completely master this method before you can use it.
Another thing he noticed when reading this manual is that the spiritual energy of both Bleach and the world of One Piece has a lot to do with the willpower and determination of the individual.
Sitting back down in a lotus position he began, slowly closed his eyes and began to concentrate. This was phase 1 called "Fundamentals of Spiritual Power", this phase was divided into Energetic Sensitization and Breathing Techniques.
Sitting in a comfortable position, he should close his eyes and try to perceive the spiritual energy around him in small amounts. This involves concentration exercises to detect the subtle spiritual vibrations in the environment.
Yamamoto with his eyes closed, began to breathe deeply several times to relax, then reached out his hand, and slowly moved his palms back and forth, feeling the ambient energy between his hands. He was to imagine that there is a slight sensation of vibration or warmth in his hands as he moves them.
He was to continue this exercise for several minutes, concentrating on the sensation of energy between his hands. Aiming to detect any changes in the intensity or quality of the energy.
After 15 minutes, Yamamoto opened his eyes, "It was faster than I thought," he whispered with a slight smile. During this time he was able to detect the changes in the intensity of the energy in his hands, although it was in small amounts.
With the first exercise finished, he moved on to the second exercise still focusing on Energetic Sensitization. The first exercise was about the perception of environmental energy while the second one is about focusing on internal energy.
It took about 20 minutes to feel even a small sensation in this exercise, a little longer than the previous one. Finally, he moved on to the third and last exercise dedicated to Energetic sensitization.
This last exercise was more like a type of meditation and took Yamamoto the longest time, approximately 25 minutes.
*This manual is priceless* thought Yamamoto as he opened his eyes and looked at the manual.
In One Piece there are no such methods to achieve spiritual energy control, most of them are quite rough methods like the observation haki which is simply putting on a blindfold and trying to dodge someone's blows.
In contrast, in this manual, there is a very specific training plan even for people who do not have spiritual energy. This would allow there to be many more people using spiritual energy in this world, "I must take advantage of this manual for other people and not just use it on me" whispered Yamamoto.
To face the World Government he must have powerful allies and subordinates, so it is key that all of them can use spiritual energy either to use the haki of observation or weaponry or techniques that he teaches them as Kidō among others, even so, first he had to improve his strength before teaching on a large scale.
On the other hand, they had to be very trustworthy people since, if this method leaked out, the only thing it would do is make his enemies stronger and he did not want this.
Putting these thoughts aside, he began the training again, repeating the same exercises.
These energy sensitization exercises help a person become more aware of the spiritual energy around them and within themselves. As these exercises are practiced regularly, one can develop a greater sensitivity and affinity with the spiritual world. This is an important step in increasing spiritual power.
After 1 hour and a half his Spiritual Power training was given as finished, in this time he was able to do one more round and a half of these 3 exercises. In the last ones, he could feel more easily the change in the spiritual energy in his hands.
*Once my energy awareness increases I will move on to the next step of phase 1* thought Yamamoto, although he did not know how long this task might take him.
He quickly returned home to write down this training and the time each exercise took, he noticed that this training was mentally more tiring and after sitting for so long, he felt all his bones stiff.
Finishing writing down all the details of this workout, Yamamoto was already thinking about how to approach his next workout, which was with his devil fruit the mera mera no mi.
He knew that the power of a devil fruit depended a lot on the imagination of the user, so he should also give importance to more mental training and not only physical, as he trained before.
After an hour in which he was rested and devising an optimal training plan for his devil fruit, he left his house again in search of a more isolated place and this time not a forest because he did not want to start a forest fire on the whole island.
Yamamoto walked until he reached a rather peculiar place, it was an area of stones of quite considerable sizes, which made it perfect to practice with his devil fruit, "Well let's start" said Yamamoto trying to encourage himself, as he was bit tired of training for so long.
Never in his life did he train as long as today, *I'd rather face a buster call...* thought Yamamoto lazily.
The first thing he did was to start practicing with small flames. I create and control small flames with precision, and extinguish them quickly when necessary. The latter was the most difficult thing, it was not as easy as ejecting flames.
When he used the fire bullet that killed Nelson he used all his concentration to achieve such a feat, which was somewhat embarrassing, so he had to be able to control his flames well and be able to compress them more easily.
His next step was to train elemental intangibility, he wanted to reach the level of achieving it unconsciously. In his confrontation with Eric, he had to concentrate to achieve it, so it is still far from becoming his element by reflex to a surprise attack.
When he finished this, he started to train more deadly techniques, he concentrated in two on the fire fist, Ace's characteristic attack that consisted of launching, from his fist, a huge amount of fire that burns everything around him. And the fired bullet that he used to assassinate Nelson.
He remembered that in the anime Ace easily split several ships in half with his skill, so he wanted to reach that level minimally. Getting to the level he had in the buster call would be more complicated.
After all his progress of 33 points in beginner was really very little and he was able to kill Nelson thanks to concentrating and compressing a lot of fire in his finger.
When he finished training these two attacks, he moved on to the final part of the training which was a meditation focused on improving the power of his flames. Reading the manual he bought of the system, he was motivated to create a somewhat similar training method but focused on his devil fruit power.
Sitting in the lotus position, he began his meditation by visualizing in his mind the fire as a living, glowing image. Then his form began to change, as he inhaled Yamamoto concentrated on feeling the heat and energy of the fire. Finally, he began to experiment with different shapes and sizes of flames in his mind.
*That's it* thought Yamamoto as he slowly opened his eyes and stood up.
Pulling his watch out of his pocket, he noticed that this training lasted 3 hours, half an hour longer than he had planned. His stomach roared again hungrily, he had never felt so many times hungry in a row in his life, he quickly headed home to cook something.
*If I keep eating at this rate, we'll need a Sea King sooner than I thought* thought Yamamoto on his way home.