Hi Daniel,
The eyes are the focus of the face, and it pays to spend a bit of time on them. Once upon a time, I used to put a black blob of paint where i thought the eye would be, and was happy to say "I've painted the eyes".
You've got some talent mate, so why not make the eyes more realistic by reducing the size of the pupil and eliminate the wide open look.
Have a look at your own eyes in the mirror, and use them as reference.
Eyes are shaped like ovals not circles, with the lower eye lid running in an almost straight line across the bottom of the pupil.
Try to make both eyes look the same if you can. From your photos it looks like one eye is much bigger than the other.
These are just suggestions,but I think with time, patience and practice, you'll see massive improvements in your painting over a short period of time.
The one thing that you clearly have loads of is enthusiasm, and that's the most important ingredient. Without enthusiasm, even the best painters in the world would produce crap figures.
Don't be disheartened if you can't paint like a master in a couple of weeks, it takes years of practice to become that good.
I've been modelling for over 30 years and I still feel frustrated that I'll never be as talented and skillful as some of the guys here on Planet Figure.
The main thing Daniel is don't give up. Keep having a go and you'll become as good as you can be, and that's all we can hope to be.
Cheers