Good for you. Of body composition, you'll burn off fatty tissue and gain muscle tone. Eat protein, like meat or protein shake with amino acid supplements, 45-60min after working out with weights to optimize all your hard work. You want to end up with something like this...
I've been lifting weights in the gym for over thirty years and noticed more and more women are maxing out like below, which is cool too. Only you can get what you really want outta life. It all starts with what you got inside that will eventually show on the outside. Now get yourself to the gym and Crack the whip!