Girl

The eyes are fine - apart from a little too much shading around them. Was this intentional? (To me, it looks like she has got rather tired or even 'black' eyes...)

It might be that you have been working a bit too hard on them and maybe the shading was caused by several erasures?

I find that the best way is to just draw them as they come and accept the results. That way, you will be able to develop your own style...