I like this, honestly better than some of the pro entries I've seen, you're definitely on the right track. you are miles better than when I was 13 years old, the proportions and perspective may be a bit off but you've got plenty of time to improve. So stay at it if you're passionate about it and remember, Youtube is full of great free tutorials too so that is an amazing tool to use to your advantage I didn't even have as a kid. Also, shameless plug, I have a channel and I plan on posting some more how to draw tutorials soon so, If you'd like to check that out there is a link on my page, or just search "Richard Simpson Art" might be helpful. Good luck on your future Art endeavors! :-)