I like it a lot, thanks for the chapter, maybe for his chakra problem he can use some things from the movies, like the helel stone (I think that's its name), there is an armor that absorbs vitality, I think it would be fun to send the mc to these missions, plus they would help him a lot, another thing would be to give him a wind nature and omit the sukuna technique, using the cutting property he has, that added to his shadows would be a good combination, good luck and I wish you the best
An idea for how the technique came to be in Naruto (besides the whole reincarnation thin), as well as why it's so broken, could be this: Indra and Asura, sons of Hagoromo, had 2 children each, all 4 bearinh the names of what will someday be their clans (whether that's their first names or they didn't gain the Otsutsuki name, up to you). Senju and Uzumaki (if this does end up in the story, please make Uzumaki a woman, I just can't picture her a woman) for Asura, and Uchiha and Nara for Indra. The Nara didn't inherit the Sharingan, and therefore the Curse of Hatred, with Indra banishing him. He was saved by Hagoromo, who gave Nara the 10 Shadows using the Creation of All Things (Nara also has lots of Chakra and high affinity to Yin). Honestly, I kinda want Nara to be a woman, and look like Yorozu, Yorozu Nara. The original Goal of the Nara was to regain the 10 Shadows, but have since forgotten it and no records (besides temples and all that) remain of the 10 Shadows. The reason for its resurgence is a coincidence, with MC's father being a Senju (and his mum probably had something too), bringing the much needed Yang element to complete the Kekkei Genkai. The reason no Nara has been Indra's Incarnation is due to being disowned, as well as not having the Sharingan