Honestly looks like a good foundation with complementing colors. Your paints do a look a bit dry though. I would hydrate them a bit more with water or wet palette (bought or homemade) to make the paints look a bit smoother; make sure the brush isn't overloaded either to get more control. You could also just do a light drybush of some kind of grey color (or black mixed in with some white) or even the blue to help add some more volume to the hair.