Head Hair Study - Phase 1

I've been trying to get some practice drawing hair. Mostly just trying to work on simplifying the forms and understanding how to draw it. I plan to do more, but here is what I've done so far before and after I got sick.

Here's my reference photos. For the drawings above I would draw from the reference, but then also try to draw the head from other angles using my imagination - some came out better than others!