Check this link out first. Then read through as many articles as you can. Search by author for ones that deal with your goals. Clay Hyght and John Meadows have great bodybuilding articles. Knowledge is your biggest tool.
Pick a sensible balanced programme based on the information you get from here. Then STICK TO IT for as long as you can. Only change up if you have stopped making gains and you know your diet is good.
Eat as much as you can.
You will gain a hell of a lot of size and strength without steroids. Make progress naturally then reassess.