>>364179843
This is pretty much correct. But to clarify, basically most "advanced blender skills" and skill in 2D art can be thrown out the window if you just want to put an existing model into the game. At that point it gets more technical work than anything else, and it's how most non-artists start out with making avatars.
Kitbashing also doesn't need significant 2D experience. I know this because I'm practically incapable of creating 2D/3D art from scratch, but I can kitbash, retopo or fix up existing stuff just fine.