>>313855962
headswapping is very easy.
>delete the body on the model who's head you want to use
>delete the head on the base body
>move the head's armature so that it lines up
>delete all the body bones on the head's armature
>delete all the head bones on the body's armature
>select the head mesh and then the body mesh and ctrl + J to join them
>select the head armature and then the body armature and ctrl + J to join them
>go into edit mode in your new armature, select the head bone
>in the bone panel on the right (bone icon), set the head bone's parent as the neck
and you're done
base bodies:
https://mmda.booru.org/
https://bowlroll.net/r18/file/tag/MikuMikuDance