I would tell my teenage self to enjoy your life as a teenager. Don’t rush into adulthood because you will be an adult longer than you will be a teenager. Don’t let anyone convince you to do adult things trying to convince you that you would have fun. When you attempt to do adult things you will likely end up with adult responsibilities you are not equipped to handle. Premarital sex, baby out of wedlock, drugs steal your teenage life and innocence. Remember there is no place in your life for those things if you want to go to college and have a career. Be careful and protective of your precious life and don’t play Russian roulette with it because you may win a few spins but losing is in the cards. You end up broke.