Your gonna do whatever you want no matter what anyone tells you:
But Im gonna break it down like this, at 18 your natural hormones are normally pretty damn high, your body is still growing, and you should be able to make fantastic gains from eating a ton of good food, training correctly and getting plenty of sleep. You can also try adding some natural or non-steroidal supplements to the mix to help you make even better gains. If you ask for help in those areas, there are a ton of knowledgable people on this board that would be more than willing to help you.
As far as the drugs, if you do them at 18, you will mess up your natural hormones, you may never get another inch taller(you might still have a little height to reach), and you wont enjoy the best time of your life because you cant drink, or you'll kill your liver, you might have erectile problems if you dont get your hormones back to normal with a proper pct, so when you think your gonna score, mr peepee wont work right, and you gonna get acne worse than what you have now.
Oh AND superdrol and halodrol are totally different in terms of side effects, gains, and risks. Sd is much worse in terms of sides and better in terms of gains.
:study: