I drew some skulls and I think they turned out nice. I also have some questions, if I want to do portrait do I need to know the difference between male and female skulls, can I move on to Anatomy with this level of gesture drawing, and how can I improve my shading skills

Probably could've done better on the proportions

Some structure practice. I tried drawing it a bit more boxy this time. Definitley needs a lot more work but I don't think it looks horrible. I think I might want to work on arm/leg anatomy along the side, or adding hand/feet to my structure. Thanks a lot,

Some structure (I think). Probably should have stuck to boxes so that it's more rigid.

I've been trying to make gestures less stiff, mostly by trying to do them faster. I still think they look pretty stiff but definitely I think I've been getting better.

Gesture with some anatomy. I've been slowly trying to add anatomy to my drawings. It looks slightly off to me though for some reason. Critiques greatly appreciated!