Your age is not your problem. However you can prepare well for a marvelous coding future if you invest your effort, energy and time for coding foundations. Like mastering math that comes along with  coding. That'll be plenty to come i suppose in your high school books. If you can solve for example the basic math problem like that which is being used in bitcoin, like: y = mx + b, you will not just do will in coding or get a brighter years ahead with programming but you are sure to make a fortune as well.