For your age you need 2000 calories daily to safely lose weight. You are young and exercise would help you lose your ‘stomach’ as you stated. As you exercise, measure your waist and hips as a guide for trimming down. We build lean body muscle mass which weight more than fat so the scale reflects no weight loss when in fact the body is trimming down fat. The tape measure will measure loss of inches and your clothes will start to feel looser. As far as food goes, I would recommend a Heart Healthy diet which is a moderate fat diet. Moderate fat diet means = use polyunsaturated (omega 3, corn oil, nuts, etc) fats and monounsaturated (olive oil, canola oil, peanut oil, etc) fats, no saturated fats (high fat snack foods, butter, fat spreads) and no trans fats. Eat low fat meats (chicken, fish, loin of pork) or non-meat sources (soy products, nuts), low fat vegetarian combinations (rice & beans, pasta & beans, low fat cheese & pasta), low fat and substitute dairy products (1% milk, low fat/fat free yogurts, low fat soy milk/soy yogurt), use plant oils, non trans-fat margarines, and eat a lot of fruits and vegetables. Eat daily high fiber breads and cereals (oatmeal). To help eat less food per meal, eat about 7-10 almonds (good fat), 20 minutes before lunch and dinner so you will feel full faster and not eat as much food. Do not be discouraged, weight loss can be a slow process but the slower you loss, the higher chance it will stay off. Think of this new way of eating as your new healthy lifestyle and not as a diet. Hope this helps you.