I just cannot make sure which is the best sculping use for the bodies, arms, legs, and head.
I think you are confusing sculpting with poly modelling. these are two deferent methods approach.
https://www.youtube.com/watch?v=EvzQYzczUH8
if you want to continue with how you started watch this video:
https://www.youtube.com/watch?v=cs85xlTUM3A
Please refer to the videos on the link.
This may or may not be the way you’re looking for it.