its looks ok so far, you have the base colors down. now start to shade and add more depth to the skin. add the same color in the area your working on but change the brightness of it to help with the shading. use burn and dodge tools to shade it also. blend your colors so they don't have a hard edge look to them, you want it to look 3d and natural. your off to a good start, just shade and it will look so much better.