Here are some helpful resources and tutorials that are made by amazing artists which can assist you in making artdolls!
FULL POSABLE ARTDOLL TUTORIALS:
Storybookcreatures:
Eviecats:
Posable Doll Tutorial By Eviecats
Magweno:
Armature to Art Doll Part 1
Armature to Art Doll Part 2
ZombieHun:
Basic art doll tutorial
AliatheGhoul:
The Making of An Art Doll, Part 1
The Making of An Art Doll, Part 2
SCULPTING:
Limitlessendeavours:
How to sculpt a head / face mask
How to sculpt paws
XPantherArtX:
:.Sculpting Materials.:
:.Sculpting tools - Tutorial.:
Sculptor101:
Making figurine hairs animal fur tutorial part 2
Making figurine