>>335001938
Arktoon is a good beginner shader but is depreciated and I've heard it doesnt work with Unity 2019 (for whenever vrc updates). Reflex shader is very very similar but is getting updates, and is beginner friendly.

UTS2 is the standard shader for Booth models, so it's useful to learn the basics of it eventually, but I don't recommend doing so first since its got a lot of features. It has decent documentation though.

Other popular shaders include Poiyomi's, Silent's, and ACLS (Aciils'). I don't recommend any of these to beginners.