You're 18? 16? I should've read more carefully. You are reaching peak natural testosterone and IGF-1 levels naturally and have no need for AAS. You'd only screw your HPTA and for nothing because you won't keep any gains that you get because you haven't reached natural potential. Steroids are not the answer.
By not taking steroids.
Another reason you should stay away from them.
Take a look at this:
Your IGF-1 levels are almost certainly higher than mine and I'm on growth hormone. Why? Because you're 16! You don't need to be taking steroids. All you'll do is screw up your body's ability to keep producing high levels of testerone etc. take advantage of what you have and don't waste it.