[Strive]

You are so young. Don't let your age deter you from your goal. What you need is a time management plan. It sounds like you might spend too much time worrying. Just relax and stay focus.
You are worried about a future. No one, and I mean no one has control over. The one thing people can do is use the present to prepare themselves for the tomorrow they want.

Think about all the goals. You have achieved. Remember at one time, those goals were in the future, you have reached them.

Remember, today is yesterday's tomorrow.