I still call myself a beginner in art, so I know what you are going through right now. Here is a tip to help you correct facial proportions. Look at the inner corner of the eye and see how that relates to the nostrils. Even though it's not 100% vertical line, it's pretty darn close. This applies to many angles if the nose is the right width. Look at the attached picture and see how a simple rotation could really help the proportions.
The second picture I like to point out is the 3/4 view. The eyes look flat, especially the one farther away from the viewer. Remember, these eyes are spherical.
I noticed one thing about your facial studies - they're all so light, and you apply strokes so sparingly, barely defining shapes. Be brave! Make your strokes bolder, use the side of your pencil or stick to block in shadows more widely, and use a whole tonal range to form the features.
These are studies, they don't have to be super neat, what you learn by doing them is more important. And all the studies here look rather unfinished, like you can't summon the patience to go all the way through. I suggest you draw the human skull in 3 angles (frontal, profile and 3/4) and finish it. Then draw a dozen more angles more quicker. Then do the same with faces. Alternate between quick studies and more elaborate ones.
And if you're ever stuck on something, observe your own face in a mirror, pay attention to the whole 3D thing
Kaylel Thanks for the tips I'll keep it in mind. My main troubles right now are eyes and their positioning as well as lips.
nelchee I tend to erase some lines I'm not happy with. I want to avoid making too many lines also , by you saying that the studies look unfinished you probably just mean the part of the eyes and nose and nothing else I presume. I just kinda like practicing that part since I never get it right.