how did sukuna became a curse

I think it was two fingers. But it's been a while since I read that part, so I might be a bit off.

Sukuna didn't manage to kill Gojo. The storylines and battles unfolded in a way that Gojo remained alive and intact in the manga.

The curse of the Luo family was to protect Luo Zhaoyan by sacrificing the lives of the other members of the family in order to break the curse of the twins. Luo Mingmei used the entire Luo Clan (excluding Luo Zhaoyan) and his own death to remove the curse, allowing Luo Zhaoyan to live a normal life. The specific method to break the curse was not mentioned.

Sukuna typically has ten fingers in the manga.

Sukuna usually has ten fingers, just like a normal person. But in some special scenes or forms, it might vary.

I think Sukuna has eaten quite a few fingers in the manga, but I can't give you an exact number off the top of my head.

Sukuna has eaten quite a few fingers, but the exact number varies depending on the specific story arcs.

Well, in the manga, Sukuna is depicted with the normal number of fingers, which is ten. This is consistent with the typical human anatomy.

It's hard to give an exact number. Sukuna's consumption of fingers varies throughout the manga and is often tied to plot developments and power-ups.

Fan Sizhe cursed in the sixth episode of Celebrating Years.