>>389180379
find a model that is already set up specifically for vrchat like a decent quality booth model then reverse engineer it. (as opposed to mmd setups like you find on deviantart, that will be confusing). see how bones are set up, and how weight painting is done on each piece, how the head is attached. learn sculpt tool, weight transfer, and armature merging, and then you can basically attach anything to anything. lots of material out there; check out kung's videos to learn about vrchat armature and proportions and ingame settings.