its ok for a start(far better than what I did when I started

)
Firstly I will say you will have to be patient and learn from what people show and say to you.
Ok so here are places if you don't know where people will give C&C:
This site (You get good pro C&C here)
Pixeljoint (Very Fun, has competition and a good forum for C&C)
Pixelclass (
http://z4.invisionfree.com/pixelclass/index.php? this site is relativly new, but is based on teaching the arts of pixel art)
I would make a topic on every one of those site's, to get all the possible help you can get.
Now to to some critique:
Your character has some jaggie issues and AA issues. (here's a tutorial that covers that very simply
http://www.derekyu.com/?page_id=218 )
I like the stance of the legs, but the upper body makes the actual sprite look like its going to fall back wards.
Fix this, there are many examples of an IDLE stance on pixeljoints gallery(the gallery is a good reference)
Look closely on how they do theres, but please and I STRESS, don't RIP as you won't ever learn that way. Do everything pixel by pixel by yourself.
Thats all for now:
But if you feel that I should give you an example, then say so, as I will do it in a flash.