good job with the contours of the human body. The face looks a little scrambled in the second one, but that's fine. As you try different characters with different noses, lips, facial structures etc., you'll be able to do a standard face like hers in no time.
The texture of the sand and sky is good enough, though the water in the second one is way too choppy. Not much to say on backgrounds. Be good to see other stuff, sketches, whatever. Also, Deadfire started a new site revolving around art, photoshop (making untalented fools like me look semi-decent) or hand-drawn or whatever.
www.AshiftingPerspective.com I encourage you to join.
Keep it up; like Kraco said, you've got talent and the only way to develop is practice, practice, practice