At 15 you really need the supervision of a doctor or dietitian when losing weigjt.
The USDA suggests that 50% of your calories come from carbohydrates, about 30-35% from fat, and about 15-20% from protein. For a 2000 calorie per day diet, that equals 250 grams carbohydrates, 67 grams fat and 75 grams protein per day.
Including plenty of fresh fruit and vegetables.
"If you are seriously overweight, talk to your parents or talk to your doctor and ask for advice. Most doctors will put you in contact with a qualified dietitian who can give you a healthy calorie-controlled eating plan, together with advice on how to increase your exercise level.
Whatever you do, don't fall into the trap of looking for "instant solutions" to your weight concerns. Most of these solutions cause weight gain, not loss."
We can't rell you exactly what to eat, personal taste comes into it. A general outline is in the link below.