This is starting to take shape! I feel like the fingers are a bit too bent inwards. It is feeling a bit stiff for some reason. I would take some photos of my hand and do a few more studies as the hand has become quite a big part of the composition as it is all the way in front. The forefinger is way to bent into the palm. I also think the palm is too flat I, I would not bend the wrist that intensely. If it was a bit more relaxed this would read really nicely. You want to use this as a leading line into the illustration (think about rolling a basketball down her right hand to her left).
Loving this and hope my feedback can help out 
