100% freehand? Color shading is important, you dont wanna burn and dodge on flesh tones, you wanna pick a peachy-er color and work withing that color pallete, and then highlight afterwords with veryveryveryvery soft magenta and yellow (just a tiny bit)
Theres much to work on, but concentrate on that, becasue if you can get that down, your not gonn abe good at this.
This isnt that great of a skin, but if you learned to do this stuff right, it could be.