Yeah, you got the right idea. That will burn the fat. Just keep in mind you will probably gain weight when building up that muscle since its heavier than fat is. But you will look great.Keep your heart rate around 130ish to burn the fat, anywhere higher is more cardio exercising.
Eat less and drink water and juice know candy no bread eat bake food,salad
If you are really into going to classes, choose a high cardio class. I really recommend a spinning class. It is hard work but it also tones your legs. If you are looking to lose weight you also need to combine weight training in with your cardio workout becuase it will speed up your metabolism. Although that isn t something that will kick in immediately, it will definatly take effect and maintain the work you will be putting in now! Also... you should eat 6 small meals a day instead of 3 large meals a day. Focus on lots of proteins, less carbs and starches, and LOTS of water! Best of luck!