Wow OP, a whole 6 months? What an amazing amount of time to be in the gym perfecting your training and diet before you decided to try anabolics. I can't believe you waited this long!
Sarcasm aside, you are nowhere near ready to start down the path of anabolics. Training for 6 months is child's play, you shouldn't plateau any time soon. If your gains have leveled off, that's a diet or training issue, typically it's diet. Track calories, figure out how many above maintenance you need to eat to gain 1lb a week, or find out how many you need to eat to gain 2lbs a week. If your presses are stalling even when you're gaining weight, switch your routine. If that fails then throw in some different supplements. Try agmatine pre workout, or a designer creatine like Green Mag or NeoVar or C-Bol. After you've trained for a year or two, THEN look in to anabolics. To do so now is stupid, plain and simple. You're not ready. I doubt you know how to properly utilize the protein powder you have.
/rant