Losing weight depends mostly on nutrition, being in a caloric deficit. Burning energy and getting more muscles (which burn more energy) helps. So basically any program that gets your heartrate up and you enjoy enough to stick to for a long time (multiple times a week) will do. And remember it takes time to see progress (you probably didn’t gain the weight in 6 weeks either ). If you really out of your energy quickly, you can use supplement that can help with this. i've used vital herbal horny goat weed for over 2 months, very pleased with it. something that actually works. u can try it.