Hi, I've got a few questions that may need answering, if it's not too troubling

1: I'm trying to make a two legged creature, does it have to be marked as humanoid?
2: Every time i finish making the creature, it ends up pulling a gmod ragdoll and glitching out everywhere.
3: I can't get it to even stand up.

Hope someone helps with these questions, i've been trying to make a creature mod for a bit now and it's frustrating since looking for modding tutorials for this game is like finding a needle in a haystack, thanks.