Enjoying Nature

This is my fifth drawing from Dragon Rider! Yay! As you can clearly see, I am terrible with coloured pencils. I originally planned to colour this on the computer, but it would have taken way too long and I wouldn't have it done until school started again. If you see any ways I could improve my skills, please let me know.
Again I say, he is supposed to have four arms! Geez I hate constantly being asked about that...