I need help!

Hey, so I'm working on a mod to implement Demon slayer into Minecraft through fabric, since really the only demon slayer mods are forge only, but i'm running into issues with my code that I can't figure, I like to write in actual code and not use the block coding system cause it gives me more freedom, but I'm also not very experienced with Java, so if anyone might be able to help me out, please reach out.