Zonagon

Although art and style is subjective, I think the best course of action for you is to try to give your character "Dimensions".  What you have here is a "Flat" character in both design and anatomy.  His body needs at least appear 3-Dimensional while despite being drawn on a flat piece of parchment.  My recommendation is for you to lightly trace how you want your character's anatomy to look, so you can erase what you don't want them to be positioned as.  This way you can be able to shape and mold his idle pose before you begin the final tracing.  The sword he wields is also bent, but this can easily be solved with a simple ruler.

As I said at first, Art can be subjective, so you can develop your skills however you want.  The works of Ancient Egyptians embraced 2-Dimensional designs and are still inspiring artists today.  The best advice that I can give you is to NEVER STOP DRAWING, because the more you do the same thing over and over again, the better it becomes.

Your talent shows greatly in your work.