Well, one possible plot could be that Naruto's mini Kyuubi form is initially out of control. He might accidentally attack the village when he was a child. But then, through the help of Iruka and Kakashi, he starts to learn to control this power. They teach him chakra control techniques specifically designed for his unique situation.
The main antagonists could be the villagers who fear Naruto's mini Kyuubi form and try to drive him out of the village. Their prejudice and fear act as a major obstacle for Naruto, who just wants to be accepted.
One potential plot could be Naruto struggling to control his new mini Kyuubi form. He might accidentally cause some chaos in the village while trying to figure out how to use his powers.
There could be a storyline where Naruto's mini Kyuubi form attracts the attention of other villages. Some might want to capture him to study his new form, while others might see him as a threat to the balance of power. Naruto then has to deal with the political implications of his transformation. He might have to prove that he is still the same Naruto who wants peace, just with a new power that he can use for the greater good.
If Naruto becomes a mini Kyuubi in the fanfiction, it would be a huge change for him. He'd have to deal with new instincts that come with being part - Kyuubi. He might be more aggressive at times, but he'd have to learn to control that. His relationship with the other villagers could also change. Some might be more accepting since he's using the Kyuubi's power for good, while others might still be afraid. And his training would be different. He'd have to focus on mastering his new form and powers, which could involve some really cool new jutsu and fighting styles.
Well, he might face some challenges too. Other characters might be afraid or suspicious of his new form. They could mistake him for a threat, like when he first had the Kyuubi inside him. Also, Naruto would have to learn how to control this new mini Kyuubi form. It could be difficult as the Kyuubi's power is wild. But if he manages to control it, he could use it to protect the village in new and unexpected ways.
One idea could be Naruto having an instant connection with the Kyuubi's power at a very young age. He might be able to communicate with the Kyuubi in his mind without the usual struggle. Another could be that he is born with some of the Kyuubi's physical traits, like red - tinged eyes or a small amount of fur on his body. This would make him stand out even more in the village.
One popular plot twist could be that as a female Naruto born as the Kyuubi, she has an even stronger connection to nature. Maybe she can communicate with the forest spirits in a way Naruto in the original couldn't. This could lead to new alliances and powers. Another could be that her female identity causes different reactions from the villagers. Instead of just fear and hatred like Naruto faced, there could be a mix of awe and jealousy, which would change her relationships and how she grows up.
Well, it could change a lot. For one, Naruto might grow up with his parents. This would mean he'd have a completely different upbringing. He could be trained by his father, Minato, from an early age, perhaps learning all kinds of advanced jutsu. His relationship with the village would also be different. Instead of being an outcast, he might be seen as a hero's son, and be respected right from the start.
Well, with his teachers, like Iruka. Iruka might be more hesitant in approaching Naruto at first because of his connection to the Kyuubi. But as he realizes that Naruto is still the same kind - hearted boy, he would become a stronger supporter. As for Kakashi, he could see Naruto as a more complex case. He would need to train Naruto not only in normal ninja skills but also in controlling his Kyuubi - born powers. This would create a different dynamic in their relationship compared to the original story. Naruto's peers in the village might also either shun him more or be in awe of his power, depending on their personalities.