When people say you're too young, they're not saying it to be parental or cautious. It just isn;t a good idea for someone to start to early. More complications and in the long run, you'll have lesser gains from future use.
In the meantime, there are some supps which will give sick results at your age. Have you tried a serious run of UNLEASHED and BIG BLAST? Dude, at your age, it'll be like juicin. If you just HAVE to satisfy the curiosity, then try a low dose of Beastdrol.