Hey, I know how hard it is to photograph kids, I have three of them, and they're all boogers. I just entered one in a current challenge that is being less than well recieved, just as this one was.
I think the lighting could use some work, it's hard to get babies to look where you want, but letting the eyes shine and connect to the viewer is essential to portraits, I'm learning.
Keep trying, studio portraits are difficult to get spot on, especially if you have no lighting and the subject is a little one. You might look at picking up some slave flashes that fire when the flash on your camera goe off. Work on posing and lighting, with a dummy if you have to. :O)
I like the lighting and the choice in background. The main thing holding this image back however is the lack of contrast, which could be fixed with a levels/curves adjustment in post.
As far as the composition, I kinda like what you were doing here however I feel this could be better if she was looking directly to the right since there is more negative space there.
a nice shot, but the exposure is a little off. if the face were better lit and the background either darker or graded more, it could be a better shot. and i'm afraid there's just something about the angle that feels awkward, and annoys a little. that said, nice colours and textures.