You're too young for it to be a good choice unless you have an extraordinary reason for doing it. Think long and hard about why you're intending to run gear.
If you're on the cusp of sports greatness to the extent that the next few months could set you up for life or seriously put you on the ladder towards such an aim then it's simply a choice you make as you balance the detriment to your body against the ambition to succeed and everything that possible success could bring. In this case you should seek personal coaching rather than slum on a chatboard. A chatboard should simply be for your ongoing research.
If you're just another joe teen who wants to look a little more jacked then go over to the training forum and forget about gear for a long while yet. With a good training program you can do more than with gear and an average training program. At your age that is even more pronounced.
It's your body to destroy. It's your call. Either way, it would be a mistake to embark on a cycle without being adequately prepared and informed.