It's really inspiring how much work you're putting into this. Not often are people this for real when they say 'I'm going to study'.
Here's a token of my support for the inspiration you've given.
The work you've done with noses shows. The thing I had to edit less was the nose. The volumes are there. You probably understand noses better than I do now, the rest is just draftsmanship.
But do you see what you have to do next? You have to learn how to de-symbolize eyes, lips, ears, eyebrows, hair etc all of that next. Step by step, get to a more solid understanding of a face. The way you do lips specifically look like mr. potato lips because you haven't gotten the hang of lips being part of the skin. You append them on the face. But they're just folds. Blood-red folds with lots of nerve endings. By far the most difficult part of the face after the eye to de-symbolize and draw "as it really is". I am not even halfway there either, but it's a useful middle step to look at.
I am awful at necks, just completely invented, but again, perhaps it's an encouraging middle step between where you are and where someone who really knows how to draw would do it.
Please carry on with your studies.
