Looks great! I've tried a few drawings on a tablet as well, and it's pretty difficult. Your lines are amazingly fluid and give a good sense of depth. I still have trouble with creating fluid lines and depth with lines. It's amazing you did that well on your first try. Next step is learning to work with color and shading on the tablet which is one of the hardest things IMO. But just with how well this is done on your first try with a tablet, I'd say you'll have little to no trouble. One thing that helped me with color and shading on a tablet was working solely with white and black first to understand how layering works and such. Good luck on your future drawings, it looks like you certainly could go somewhere.