Hi, I was trying to implement a new class through a datapack, the problem is that instead of the new class apearing inside the class list it appears as another menu saying "choose your layer.nomad.class.name" (nomad being the name of the class I am trying to implement) with only that class, is there something I am not getting?, I haven't been able to find anyone who as tried makeing a custom class and has posted something on the internet and I feel like I have tried everything.

Make sure the name of the folder is origins-classes and not origins_classes (or similar.)

Yeah, there's definitely something wrong on your end. Here's an example custom class datapack:
Pirate.zip