children shouldn't be messing with steroids.
you don't even hit your prime with bodybuilding till you are in your 30's believe it or not. the average age of mr olympia is 34 years old. Arnold won it in his 20's but he was a genetic freak.
you have years of muscle memory and building a base to reach your goals. no reason to rush things. I spent years training both weightlifting and endurance running. it has allowed me to build a nice base and learn about nutrition, workout techniques that work FOR ME. then when i was 29 i decided to run my first cycle. now in my early 30's I am in the best bodybuilding shape of my life.
this isn't a sport to me, this is a lifestyle. at your age you are still figuring out what you want to do, in college, living with the parents, etc. there is no way you can dedicate the time and resources into this yet so might as well be natty