Gojo personally supervised Itadori's training to use cursed energy, putting him through the very basics of outputting the power that would allow him to use jujutsu.

Source: https://www.cbr.com/jjk-yuji-itadori-main-character-proof/

Itadori's unwavering commitment to living without regrets fuels his fearlessness in the face of danger and his determination to make a positive impact in the world.

Source: https://gamerant.com/jujutsu-kaisen-best-quotes-yuji-itadori/

To help push the adventure that takes shonen fans back to the past, new art has emerged which sees the former trio in their time as the series' stars prior to Yuji Itadori's arrival.

Source: https://comicbook.com/anime/news/jujutsu-kaisen-new-gojo-flashback-sketch/