Getting Back Into Digital Painting

So ever since I finished working on the geisha painting, I've been wanting to go back to doing more painting. I've been looking for a something to paint, and I decided to paint a black and white picture from one of my favorite manga series called Gantz. I found the picture that I wanted, and made a trace of it a while back, but never actually got around to painting anything on it. Here is what I have so far:

I did some of the shadows and put down some base layers for the colors, but I don't think I like the color that I picked for her bikini, so I may have to look for something else that works better.

Anyways, hopefully I'll be able to work more on this piece since it gives me a chance to develop my 2D art skills. Thanks for reading!