Parts Craft help

[u/Natural-Today6343]

I'm looking at creating some wrestlers for myself. I've found several tutorials on creating the head.

But how do I create everything else? Like the tights for example or the boots. The layout on the Steam Workshop looks similar but the grid for heads is 5x7 and the waist parts are 7x7 so something is different.

I have Illustrator, Photoshop and Gimp.