Art is different for everyone tbh
I use maps to at least help me find the shape/pose of what I'm trying to do, to see what I'm doing and if I like it before I get to into my sketch
I'll take what you have into note, though!
well the shapes are just shapes. A base before the lines. Helps to have a more 3d looking base in my opinion.
But that's just what works for me.
Sometimes, to help, I section my own hands in pen and use it as a reference.
ooohhh
I might have to try that!