If I lose weight could I be good in football?

Ok I'm 14 years old in high school and want to play football for the firs time sophmore year. I am 200 pounds mostly fat. I would like to know if I lost weight if I would be better at football. I do not want to be a lineman. If losing weight wil help me plz tell me exercises to burn off fat and gain muscle. I do not have a gym in my city so that would not work. Plz help and thanks