not bad, the face is kinda scrunchy, but don't worry about that for now. Hammer out a body first. For TA, try and keep the details of the concept art in, such as the really big pointy shoulders, etc in the mesh. Your shoulders are kinda round right now, i'd suggest flaring them out.
For your arms, try and define the muscles a bit more, right now her arms are just tubes. Also, its a bit hard to tell but i think they base cylinder of yer arm is too high rez. 8 sides is what you should aim for.