I would just like to start by saying you can most certainly draw as you've get the skill to be quite remarkable if you stay the course.
My only critique is probably the lack of any strong shading to intensify the overall effect and add impact to the image. He looks incredibly young - a few lines and shades here and there would add 50% more character. I also don't get any emotion from this image at all, and I'm not on about your subject, I'm on about you, the artist. I don't feel any specific style.
Having said that, it's a good picture and I can already see the beginnings of something rather good. Just practice, practice, practice!