The pose looks a bit awkward, unless this is a cowboy about to draw his gun or something. Even then the elbows would be flared out a bit more. Proportion-wise, I agree with Emma about the arms and I also think the crotch area is pretty high. It's hard to say much about what the proportions should be without knowing whether this is male or female, child or adult, though. You might try gestural drawings to come up with a more natural pose instead of starting out with the body outline.

Cloxboy insists that anatomy is best learned with pencil (or pen?) and paper, however, so you might try sketching a pose out on paper a few times quickly until you find something that feels more natural.

oh boy this is awesome. I can't believe that my adrenaline gets higher when I look at this!

Make sure you fill up all that empty space if you want this to stay on the intermediate board.