it's good to know you are practicing different body styles, but girls need to have more curvy look, and shading? use the blend tool and make as many different shades of that color you want it to have, such as if you want 3-tone shading, you make 3 colors that are close to each other and you can blur it to have a more natural effect. also have a lightsource, that helps alot too.... good luck, and I hope I helped you!