>>372085129
Game rips, mmd models. Unironically check deviantart for .pmx downloads of whatever character you want. Models-resource.com has heaps of old shit too. Throwing the model into blender, downloading the cats plugin, and hitting the cats fix button is pretty much all you need to do to get an mmd model ready for vrchat. Uploading from unity is easy too just check the vrchat website for which unity version you need and sippbox's tutorials on how to get your model set up.
It isn't hard. There's a lot of jargon and having to install and use 2 programs and a kind of file you've never used before is pretty scary but not hard.
Don't jump straight into a booth model. Have a personality and do something interesting instead.