Hello Beth: A wonderful start you have here.
I think that Steven is spot on with his comments. You have an excellent start, which has defined your form and gotten everything on the canvas. I believe that what you need to do now is mostly refining.
I am assuming that you want to keep it somewhat loose and impressionistic, so you choose how detailed and tight you want to go. The thing is, every time you go back into it and repaint a passage, the "saturation" and "finish" of that passage gets better because you are building layers of paint and refining what you already have established. I have attached a picture of a passage from one of my paintings - first coat of paint, and last coat of paint. There were probably 3 or 4 coats inbetween - each bringing the level of finish and saturation up.
The main thing I see is, keep refining your form through successive layers of paint. Watch the intensity of the colors of your background. I am with Steven that graying/value transitioning and softening makes things recede better than just cooling or warming them. As the flowers are quite close, you won't need much, but just knock the intensity of the colors on the flowers down a bit and make sure the edges are soft and they will settle into the background better.
Pay some attention to your skin tones and remember that you are basically painting cylinders, and globes, so you should pay attention to how the arms turn and the cheeks look rounded with proper value transitions.
I hope that helps!
