This looks a bit better but I don't think that you have problem with pixel art you have problem with drawing overall. I suggest that you practice drawing with pen and paper to loosen your hand and learn to draw shapes. You should use references (read few books if you want),draw as much as you can and try with pixel art again later. Progress will be obvious. I don't want to be harsh but I think that this will be most helpful solution.
Also look at this tread:
http://wayofthepixel.net/index.php?topic=16253.0
