ok so im 20 years old and weigh 143 at 5'6. I have been working out for a little while now and no matter what i do i cant seem to gain any weight. anyways i was just wondering where i should start? im very new an need some black and white advice of wut to do. also what type of side effects will it have. i know about the acne usually, and my skin is not very acne prone usually i was just wondering if this makes a difference? im not too worried about my back or arms but i dont really want acne on the face? any other side affects to worry about. thanks for all the help