I really like your question. The answer to your question is really simple but you will not understand it till sometime later
To be rich and young, you must be smart, identify a problem in your life or your community and solve it. People will pay you money for it and if you solve a problem for a 1000 people, you will be a thousandaire, if you solve a problem for a million people or a million times, you will be a millionaire, if you solve a problem to a billion people or a billion times, you will be a billionaire.
I know you do not understand what i have said but to really understand it, you must do research about how the people who are rich and young made it.I will recommend you read a book called the millionaire fastlane by mj demarco. if you are really interested let me know and i will give you the book for free.