Whoa, that's great for your first drawing. Everything's in poportion (gawd I don't know how to spell this word)! Though you could give him his ears, and just touch up his left shoulder a little (it's slightly bulky compared to the right one). Anyways, great job!
Not trying to be a jerk but I don't like the style. I perfer more realistic pictures. It is good for what it is though.