First I would like to say, invest in some better paper. The paper you are working on for this technique and media is grossly inappropriate and is making your work suffer.
Second, I can tell you are pretty heavy handed, based on this and your other works. This is hurting your control of the material. Work slower, with lighter strokes, especially when you are working with wet mediums. Layering works better and has much more satisfying results than just dunking a brush in water and smearing it about. Try dry brushing some stuff, or using a brush with barely any water and note the effects they give, it might help solidify your piece instead of making it look messy and overly washed.
Finally, the composition is much better in this than some of your other pieces, you do a decent job of moving the eye around the piece due to the pose and appropriate amounts of objects outside of the figure.