Good job for your second time! When lighting it's important to keep in mind what it's going to do to the skin of the person you're photographing. Pale and/or oily skin tends to wash out really bad. Dark skin tends to get hot spots. You counteract pale or oily skin with a foundation or by diffusing the light. You counteract hot spots on dark skin by using indirect or diffused light. I see from her glasses that you're using an umbrella, which is good to learn with. But a hotbox can do you a lot of favors in seeing how the person's skin is going to look.