Hey bro, you will probably scan past this post and think I'm an idiot but...
18 is too young to be doing gear. Eventhough you think your body has matured, and while it may look that way it has not and messing with your hormones at your age can cause problems that you will have to deal with and regret for the rest of your life.
In addition 4 months of lifting is NOTHING, even if you were years older you still wouldn't be ready for the juice yet.
I don't want to get toned, I just want to become a fucking freak.
I just work out because I want to look good with my XXXXL shirt on.