i do have some tips for you as will everyone else on the forum... DONT DO IT... i dont care how competitive you are... noone with any sort of sense or care would ever advise you to run steroids... your many years away from that... you will completely ruin yourself internally and set yourself up for nothing but problems and a shortened life inevitably... right now you need to focus on eating, plenty of protein etc... you could look into creatine but other than that, there's nothing else you should be messing with at 18 years old... except girls! then by all means have at it!