exclusive, take my advise. Dont do it. If you have to do it, wait till your older and wiser. I made the same mistake your about to make when I was 18. I was a lot smaller than you. I worked out for a while, and wasnt getting the instant results I wanted. I took steroids and ya I got stronger, bigger, but the side effects were shitty. zit all over, balls shrinking up. And when they talk about roid rage, they aint jokin around. I didnt even look cool. I was all bloated, broken out and mad all the time. Then when I came off, I lost almost all the weight. So it was pretty much a waste of money as well. Im sure all these things might not happen to you, cause everybody is different, but why take the chance. And I know I didnt do it right, but that was because I was young, and I didnt know what I was doing. The best thing you can do is Work out for a couple years, study up on what you want to take, and if you still feel the same way, have at it. But this shit can be dangerous if you dont know what your doing.