What all those guys have said. There is a lot of stuff that you really should educate yourself on before just jumping into the AS scene.
Honestly the main reason that people use DBol is during the first 4 weeks or so of a cycle in order to see gains immediately and not have to wait for the rest to kick in. But like everyone has said, most of the gains are from water-retention and most people lose those gains shortly after. 30 pounds is not a realistic goal.
Make sure you are eatting right, and if you do a test-based cycle for 10-12 weeks you will notice much more significant and long-term gains.
like my bro above me said... Food is key. Eat Eat Eat... and sleep. Rinse and repeat
But personally id advise you to do a lot more research before you stick a pin in your backside heh.