Okay, about the tips you wanted for your skin. Everyone has their own shading style but some are more similar than others. My personal hair shading is finding three shades of the fair colour and kinda messing around with them.For the arms, it gets darker as you go away from the top of the shoulder but it should hold after about six or seven lines. The chest is harder to shade but should have the shading on the sides top corner and bottom corners. Finally, the legs, These are simple to shade and should have a kind of reverse shoulder effect. The shoes, if there are any and the hands should be darker on the bottom same with the bottom of the head. I hope this helped. Remember that you'll need to find your own shading style. This is just me.

Your Welcome let me know if there are any other supers you want in a skin just ask