Well, this is very good work. And you do have a great base to learn and get better. Training in drawing will be a good thing for you to have. I see an issue or so with this work. The forhead, right above the eyes seems a little to light. And right above that area is a long dark shadow. And then light again. Ofcourse you may have drawn this from a picture. And that could be part of the picture. When we paint or draw useing a photo. We must take into account that almost any photo is not right. Most times evan real life is not right. As artist, we make it right. You have very good drawing skills. I would advise you to get all the training you can get. And your work can go from good to super good. Keep working, And good luck.
Perfection is what drives an artist.
The inability to achieve perfection is what creates a work of art.
John A. Barandon http://steelbronze.vpweb.com