Everyone is giving you great info, so soak it all in
If it were I, I would look at Test Enanthate for 12 weeks. injecting twice a week, once every 3.5 days. so like monday morning and thursday night.
I would use between 250 and 500 mgs/week. A new user can gain nicely with 250, but the average user goes with 500 mgs/week
I would have an AI (Aromatase Inhibitors) like arimidex on hand during the cycle in case of gyno signs and bloating
I would have ALL my PCT compounds like Nolvadex, Clomid, Arimidex, and maybe even HCG BEFORE i ever considered starting
I would also read and understand this thread:
http://forums.steroid.com/showthread.php?t=349581
I would make sure my diet was gone over by the guys here and tweeked to give me the best gains
I would also make sure my training matched my goals
I would make sure I trained heavy and hard, and got more than enough rest cause that is when you grow
I would make sure during PCT that I kept the diet and training up so not to lose my new gains
Thats what I would do if I was in your shoes