I need help with a mod

Hello, and I need help with a mod called Mathioks' Naruto-Anime Mod.
I just want to know how you can increase your skills such as kenjutsu and medical ninjutsu. If there is anyone who knows about this mod and could help me, please help me so I can have more fun with this mod.
https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/wip-mods/2341656-naruto-anime-mod