Hey.
I notice some issues with the body:
Her right (our left) side is basically a straight line; that looks bad and is incorrect. While it's not terrible with the torso, when it reaches the hip it should pop out a little more. The leg on that same side is also thinner and the knee seems to be on the wrong side. The knee down on the opposite leg also appears to be anatomically flawed, though I have a hard time pinpointing exactly why. Her right hand needs some work. Her breasts and up are good, as are your proportions, for the most part. The face looks a little strange as it's not entirely on center and could be a lot more feminine looking. Her gun looks pretty good.
All of these things are things that can be improved upon through practice. It's not a bad piece, just a flawed one, and since it was made to test out a program, I suppose it shouldn't be taken too seriously.