This is great considering you drew it without a tablet! I HIGHLY recommend you save up for one when you can, they're tricky to get used to at first, but its clear you have a strong imagination and understanding of shape and pose, so not using one might waste your potential! If there are a few things I'd point out to work on, I'd say making your line work more clean would be a top priority (tablets help with this a lot), and keeping your colors nice and solid and shaded to work with the shape and environment. Otherwise, good work, keep it up!