/ic/ - Artwork/Critique

Reposting, plse help
How the hell do I make these better? Do I just "keep drawing" until I get it? What do I have to focus on? I dont want to draw hyper realistic, just semi or cartoonish, but I still want it look presentable and not like this. I feel like I understand the form, and I can think in 3D (Like when I look at the construction, it actually feels like a 3D image and isnt flat, which is entirely new to how I was drawing a few weeks ago), but the second I go to apply eyes and other facial features it just falls apart. Do I need just need to study the anatomy and structure of the eye (and i guess nose and mouth while im at it)? Is it just symbol drawing being really awful and getting to me? What video or book do i need to see to be enlighten?
Just when I though I was approaching mediocrity, some other issue comes to kick me in the balls. Please help