As a boy, you should consider taking more exercise. Basketball is a good choice for you. Eat less meat, eat more vegetables, fruits and fish, don't eat fried food, pay attention to normal diet, and don't eat snacks. Come on! Losing weight depends on exercise and diet. You can do it, come on!

Yes, I suggest you just sweat a little in the morning and exercise more at night. Running depends on your speed. If you sweat, it means you have an effect. And take more walks after meals. If the school is in the same city, you can choose to go to school on foot.