
Caffeine speeds up metabolism. Caffeinated beverages make you feel full. Cardio to burn body fat and speed up metabolism. Protein keeps you feeling full longer. Low carbs. Nicotine/stimulants suppress appetite(a lot). The idea is to lower your body fat %. Eat a lot of meat and vegetables. Avoid Oils/processed sugars. Try to limit dairy and gluten as those can cause bloating. 2-3 meals a day at similar times each day. You have to slowly lower your caloric intake over time.
Dont starve yourself or that will cause your body to slow down your metabolism. Go on runs/treadmill/workout ideally up to 6 times a week. Drink a lot of water. Try to be awake about 14-16 hours during the day and sleep 8-10 hours each night. Similar bed times and wake up times. You ideally want a regular circadian rhythm. Lastly, dont try to be perfect you dont need to follow everything i just said allow yourself to adapt over time and dont rush it. Ease into it or you will lose motivation.