Man, this is already pretty good. The gesture is pretty much there, I think that adding some gesture to the hair and the skirt will really help it and make it more dynamic. The head is a little big, the arm is too long and the extended leg feels a little stiff, but over all, nice job. I did a quick sketch to show you what I mean, I hope it helps :)
This helps a lot, thank you so much. The flow of the clothing and hair really make a difference. I haven't really messed with clothing yet so this is awesome stuff for me to keep in mind. I also didn't know where to place her left arm so thank you for that as well.
yeah, the hair and skirt feel like the best place to push it. maybe echo the torso curve through the hair and let the skirt trail on a matching arc, then shorten the reaching arm a little so the pose keeps its snap
maybe block the hair and skirt as two clear sweeping shapes first, then let the smaller folds follow that curve so the pose keeps its motion
maybe keep the hair and skirt on that same curve first, then shorten the reaching arm a little so the pose keeps its snap without losing the flow