You'll want to do a lot of cardio and aerobics first, like running, dance, light weight training, cycling, swimming, etc. A lot of people start out with lifting heavy weights, which will make the muscle build up underneath the fat and make one appear bigger than they were before, which makes a lot of people think their exercise is having an adverse effect on their body and making them fatter instead of leaner. Leave the higher impact exercises for later x3 Unless you're already skinnier and only need to tone up.