Hello. Since you are used to eating a lot, it would be easier for you to get started by cutting down on rather than depriving yourself. Tell yourself you are only going to have two slices of pizza, and eat them slowly, so you have a chance to notice that you are not hungry anymore. You can still make healthy decisions at a diner, belive it or not. Most diners have grilled chicken (the kind without the crispy coating), or some sort of a deli sandwich. If not, only eat one burger, and it's not as unhealthy if you don't put cheese on it. Don't get me wrong, a little cheese is good for you, but adding it to a hamburger is adding a lot of fat. Ask your parents to buy reduced-fat snacks - some of them are actually pretty good. You'll notice that after a while of eating less fat, if you have a day when you eat fatty foods again, you will be tired at sluggish. It feels better to eat healthy. On exercise: Do something you enjoy. If you hate running, don't run. Swimming is great, but most people don't have access to a pool, so play basketball or something. Listen to music when you exercise; something upbeat. Here is a plan that has worked for me (I have lost 10 pounds since I started about 2 and a half to 3 weeks ago) I eat 20-25 grams of fat per day, and exercise 15-20 minutes per day. Good luck!