Nice Start
It looks like you've got a grasp on the basics of the programming.
Since your an artist primarily, you're probably looking to make it 'look' good first. The animations were great, but you may want to put 'introductionary' frames before walk cycles (for instance).
When walking, make the first set of frames when you start to walk, and then the walk cycle thereafter will loop. It's quirky on the eyes when characters 'jump' into animations.
Add sound! it gives great depth to any animation (especially footstep).
I like the art very much though, the game could be very good with more plot and rudimentary feature. Look around a lot (google etc) and use the forums, there's much information around here. Contact me with a question if you'd like.