Hey, this isn't bad at all. It shows that you are trying and striving to try new things. Digital painting is hard if you don't have the patience, but what I've learned is to go back to the basic traditional method. If you can, grab some oils or some acrylics and paint on an actual physical canvas for a while. Try some self-portrait sketches every week as a goal to meet. This will only help you as an artist. Some things are off anatomically in this piece such as the lips and eyes, as well as the nose. Grab some anatomy books and fill up pages and pages of different segments of the face, that is how I learned and it is also how I improved over time. Keep it up. Overall good job man!