In his training, Naruto would probably have to endure physical challenges as well. He might have to dig through hard earth with his bare hands to strengthen his connection to it. And he'd practice using his earth control in different environments, from deserts to mountains, to fully master this new ability.
He might start with basic earth manipulation. Just like how he learned to control his chakra in the original series, he would need to understand the flow of chakra in relation to earth. Maybe he'd practice making small pebbles levitate at first.
Kaguya might start with chakra control training. Since she has such a deep understanding of chakra, she could teach Naruto how to refine his chakra even more. For example, she could show him how to make his chakra flow in a more stable and efficient way. She may also use her knowledge of space - time ninjutsu to train Naruto in that area. Maybe she'd create special training grounds using her space - time abilities to test Naruto's reaction and adaptability.
In the fanfiction, Naruto could also learn some spiritual or chakra - based techniques. He might discover a way to use his chakra to sense the emotions or intentions of his opponents. This would give him an edge in battles, as he could anticipate their moves better. Or he could learn a technique that allows him to transfer his chakra to others in a more efficient and powerful way, enabling him to heal or boost his comrades' abilities during combat.
They could do endurance training, like running long distances while also practicing weapon - handling for Tenten and chakra control for Naruto.
Perhaps it's an old enemy who has a change of heart. This enemy could think that by training Naruto, they can make amends for their past wrongs. But Naruto, being cautious, denies the offer as he still has doubts about this former foe's true intentions.
Kakashi could focus on Naruto's Rasengan training, helping him develop new variations. He might also give Naruto training in reading opponents' moves better. This would involve a lot of sparring sessions. Additionally, Kakashi could train Naruto in the use of ninja tools in more creative ways. Naruto often relies on brute force, and Kakashi could teach him to be more strategic with his equipment.
Well, Naruto could have trained in a place with high - level natural energy. He would need to attune himself to this energy to enhance his telekinesis. He might have started by sensing the energy around small objects and gradually learning to influence it to make the objects move. He also probably had to endure some difficult challenges, like moving objects in a strong wind or against the pull of gravity, to truly master this ability.
Naruto would probably give Haku training on chakra control. Since Naruto has had to work hard on his own chakra control, he'd be able to pass on some useful tips. For example, he could teach Haku how to better focus his chakra for more precise attacks.
She might become more assertive. As a princess, she has to make decisions that affect not only herself but also her kingdom or the people she rules. So she could be more decisive and bold in her actions compared to her original self.
He could practice by reflecting light off different surfaces. This would help him understand how light behaves and how to manipulate it better. Maybe he could start with small, shiny objects like mirrors or pieces of metal.
He might become more determined to prove himself to Tsunade. This could make him train even harder within the village. He could also start to question Tsunade's decisions and try to find ways to convince her that he is ready for such a training trip in the future.