Your diet and exercise program need to be set before u start steroids. What is Ur bf% age? Need a little more stats to help u out. 3 times a week isn't going to cut bro. Growing muscle is a lifestyle not a hobby and dedication to this lifestyle will show u amazing results.

Steroids should never be used as a short cut over hard work and you will no doubt cause yourself more trouble than good unless you are training regularly (about 3 times doesn't cut it) and hard & in good shape. You would get better results from increased training then dumping AAS into the mix.
Your comments don't indicate your age, years of training and bodyfat but it suggests you are not ready yet.