Here's a little advice for traditional art...
Do light sketches of what you have first. This makes it easier to erase if you change your mind and it helps gives ideas of what to add. Just like what I did with my drawings, which I believe look horrible, they have some sort of sketch done to them...
Your drawing look pretty good. But a little sketching would make it much better and grab the attention of a few more watchers...
P.S. draw more