Maybe he discovers some ancient scrolls that detail the secrets of Dust Release. Naruto, being the determined ninja he is, spends countless hours deciphering the scrolls and practicing the techniques described, until he finally gets a grip on the Dust Release.
It could also be that Naruto's unique chakra, which is so powerful and has a connection to the Nine - Tails, somehow allows him to adapt to the Dust Release more easily. He might initially struggle with it, but as he experiments with combining his own chakra with the principles of Dust Release, he slowly but surely learns it. For example, he might use his shadow clone jutsu to practice different aspects of Dust Release simultaneously, speeding up the learning process.
Well, he might start by studying the basic principles of Storm Release. Maybe he has a mentor who shows him how to control the chakra flow in a unique way for this jutsu. He could also practice on inanimate objects first to get a feel for the power.
He might learn a time - traveling jutsu. This would be really cool as it could allow him to go back and change certain events in the Naruto world, or gain knowledge from the past to use in the present battles.
Maybe a mysterious traveler from a far - off land. This traveler has mastered many unique jutsus including Dust Release. He crosses paths with Naruto during one of Naruto's solo adventures and takes him under his wing after seeing Naruto's eagerness to learn new techniques.
Well, in many such fanfictions, Naruto might start learning his father's jutsu when he discovers some hidden scrolls or when a mentor who knew his father decides to teach him. Maybe it could be someone like Jiraiya who reveals some secrets about his father's techniques.
In fanfiction, Naruto learning the Vacuum Jutsu could be really cool. It might give him a new and powerful offensive technique. Maybe he'd learn it from an unexpected source, like an old hermit in a forgotten land. This could potentially change the power dynamics in battles he's in.
In a fanfic where Naruto learns medical jutsu, it could greatly impact the story. Firstly, it would make him more versatile in battles. He could heal his comrades on the spot, increasing their chances of survival. This would also change his relationships. For example, he might become closer to Sakura as they now share a common area of expertise. Moreover, it could lead to new plotlines. He might be sent on special medical missions or be able to develop unique jutsu combinations that incorporate his medical skills.
His relationship with Sasuke could change significantly. Sasuke might see Naruto's newfound ability as a threat or, on the other hand, it could be a motivation for him to get stronger. Naruto might use the Hiraishin no Jutsu to try and keep an eye on Sasuke, which could either annoy Sasuke or make him secretly respect Naruto's determination.
There are fanfictions where Naruto is able to use Dust Release because of a powerful curse or blessing. For example, a powerful being might place a curse on him that, instead of harming him, gives him the power of Dust Release. Or a god - like entity could bless him with this ability. Once he has it, he might have to figure out how to integrate it with his existing ninja skills like Rasengan and Shadow Clone Jutsu, which would be an interesting aspect of the fanfiction.
He could potentially learn the Flying Thunder God Technique. It's a very powerful jutsu that Minato was famous for. Naruto's already fast with his Sage Mode and Nine - Tails Chakra, and this would make him even more formidable in battle.
In the 'naruto learns goken fanfiction', Naruto could learn the Goken in a rather unique way. He might be in a situation where he has to fight an enemy who is proficient in the Goken. During the battle, Naruto observes his opponent's moves closely. He then tries to mimic those moves during the fight. After the battle, he reflects on what he learned and continues to practice. Through this practical experience - learning in the heat of battle and then refining it through practice, he masters the Goken.