/ic/ - Artwork/Critique

Still trying to figure out rendering and colors (the way they interact together). I tried to be mindful of hard vs soft edges as much as I could and I hope it's better in that regard.
Didn't do sketch underneat or precise measurements, and I know it shows, but I'm really too lazy to be bothered with that. I can also see that the shoulder is way too small, sorry for that.
Now... the real question I had is... how to render hair?? mine looks like shitty yarn strings and it's probably the brush I used but I just have no idea what I'm doing with that.
Any videos, tutorials or books that could help?
All advice in general is welcome of course.