You can start by doing short, intense exercises that focus on full-body movements—like squats with biceps curls—to quickly fatigue the entire body, mainly cardio since you don't want muscles, accompanied with a healthy diet.
If you want to lose weight faster, you'll need to eat less and exercise more.
For instance, if you take in 1,050 to 1,200 calories a day, and exercise for one hour per day, you could lose 3-5 pounds in one week, or more. It's very important not to cut calories any further -- that's dangerous, and could get you sick, your immune system would go down.
For your diet you need to minimize starches, added sugars, and animal fat from meat and dairy foods, focusing on fruits, veggies, egg whites, soy products, skinless poultry breasts, fish, shellfish, nonfat dairy foods, and 95% lean meat.
Eat vegetables to help you feel full, drink plenty of water, get tempting foods out of your sight, stay busy -- you don't want to eat just because you're bored, eat only from a plate, while seated at a table. No grazing in front of the 'fridge. Don't skip meals!
Metabolism can be helped by drinking a cold glass of water as soon as you wake up every morning, also, your breakfast is the most important meal of all your meals.
Hope this serves of some info