1.1.- Your hand is too small, also it dissapears when you enter to a GUI (Like inventory) and it appears again when you go through F5

1.2.- You get damage when you crawl
https://streamable.com/13qmr2

First of all, the reason the hand disappears from the first person screen is a rendering problem, which is a problem to be solved through redevelopment using the Obfuscate library and cannot be solved at this time.

ok, no problem, that is just a minor issue.

It is believed that the reason for receiving damage during crawling is that one of the modes applied together is malfunctioning. Please subtract each mod that is applied, identify the mode that is causing the error, and comment again on which mods cause the error.

ok, it seems to be Fragile Blocks (Also known as BlockGravity according to its MOD-ID)

First of all, the reason the hand disappears from the first person screen is a rendering problem, which is a problem to be solved through redevelopment using the Obfuscate library and cannot be solved at this time.

It is believed that the reason for receiving damage during crawling is that one of the modes applied together is malfunctioning. Please subtract each mod that is applied, identify the mode that is causing the error, and comment again on which mods cause the error.