This idea was given by user Miggan on one of my earlier ideas.
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So, MC gets reborn in the world of JJK with the Powers of Obito Uchiha (Or you could just keep his sharingan abilities like Kamui)
You could make it so the MC is a descendant of the Uchiha family (You could add them to the 3 great sorcerer family, creating the 4 great sorcerer family)
Mother was a Senju, Father was a Uchiha. Giving the MC both the Sharingan and Wood style.
(Later on he could have one of his eyes evolve into the rinnegan like Sasuke)
The MC will awaken his abilities after his mother dies to an illness (or you could have a cursed spirit kill her)
The other sorcerer felt his awakening which lead to the meeting of our MC and Gojo Satoru who was asked to recruit our MC and ask him to attend the Tokyo Prefectural Jujutsu High School which he agrees to.
(I know the beginning is kinda similar to Itadoris but fuck it, if you have a better go ahead 😅)
Once he arrives at the school, he finds about the history of his family, and that his family was one of the families that went against Sukuna in the golden age.
From here on now you want to follow the manga while adding some original plots
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Some of his abilities.
Domain Expansion - Kamui Dimension, once he uses his domain, everyone within 200m radius will be teleported to his dimension where they wont be able to escape no matter what they try.
(Or you could make his Domain more like Tsukuyomi
Sharingan Eyes - Allows our MC to become intangible for a maximum of 5 minutes with the ability to turn on and off his intangiblity at any moment he wants. Depending on the strength of his enemies, he can also put them under a genjutsu.
Susanoo - *We all know what this monstrosity is*
Wood Style