Fantastic job! One thing I suggest is... (sorry this a copy pasta message that I send to help people out)
When I first started deviantart, I used to hold up all of my traditional artwork to the computer's camera and upload it as is. I know that some people don't have the resources to scan their traditional artwork and whatnot. But you can improve the quality of the artwork after you take the picture. It will help your artwork look much better. As a traditional artist myself, it helped me a ton.
So here's how I do it. You've probably heard of GIMP, right? It's a free software that a TON of people use for all sorts of stuff. (you can download it online) First, you download GIMP (if you don't have it already) When you open the software, you'll see a menu at the top bar of your screen. Click file >> open >> (chose the photo) >> open (different button at the lower part of the pop up window) >> convert (you may not get this, I don't know why it shows up) >> colors >> levels >> and adjust the quality of the photo by making the darks darker and the lights lighter.
There's also a tutorial on dA that I found a while ago but I can't find it now. There's another one that I just found, but it's not as great. Here it is anyway: [link]
Hope this helped you!
I just wanted to give this message to you because I thought that this was a really nice drawing that could be improved by changing the contrast. You are a talented artist, and I thought this could help you along the way!