>>379749664
Depends if you've done 3d before. I have 1500h in blender, never touched 3d before vrchat back in early 2018, made and sold my first scratch avatar around the 500h mark.

Probably could have finished it by 200h if I made it my only goal or followed some "make your first avatar ever" tutorial instead. I learned everything piecemeal and only decided to make the avatar when I realized I knew everything I needed to do it. I'm not a smart man, I remember it took me 18 hours to attach a pair of rabbit ears to a MMD for Easter 2018. You might learn faster than me. 

All that said, you don't need to do a scratch avatar unless you really want the prestige or whatever. Buying a base and kitbashing it in blender will eventually teach you all the principles anyway and that's how almost everyone here started.

luv me blender tho