Basically, the first problem is the hand, it's out of place. You should always subdue the hand, either by having a "karate chop" angle or using shadows, it's very distracting--as an editor I'll break out the grease pencil and crop, crop, crop. No matter what you do to the hand to minimize the veins, it's a bad element in the image, get rid of it.
Second, the hot light in the background bothers me, so you take adavtage of the crop to get rid of it, but first a little red gradient and cloning to clean up the back ground. (Honestly, I probably should have desaturated the entire background.) Then you use the "snapshots"
technique or layers to do a little more cleaning, of the face, with a soft gaussian blur, then a soft sharpen set of layers.
Finally, if you have the original and you have no other image, and you have the time, change the bikini color. The problem here is you have a warm red background and warm colored bikini, make a contrast change with a "cool" colored bikini, like a light cyan.
Finally, critiquing a bit here, take your time, focus on the eyes, not the chest, the chest appears sharper than the eyes in the original image. I'm not saying you were focusing on the chest, but many photogs make the mistake to shoot with the focus point still in the center (the chest or neck) when you should focus on the eyes, hold the focus, compose the image, then expose the image. Here's a good article on it, "Autofocus or Out of Focus?"
Obviously, working with a low-res here to start with doesn't help, but it wasn't too bad. Thanks for sharing, rg sends!