Manga eye study

I have 2 main issues at the moment with my drawings. First issue is with the eyes, I just don't feel comfortable with drawing them. Second is shading.

I decided to check out several anime shows to see how they drew manga eyes. Kind of feeling more confident with eyes now.

Here are the studies.

I then decided to practise a bit of shading along with drawing eyes on a face.

I think the next thing to do is get a finished drawing done along with studies. This should help uncover any extra weaknesses in my technique.