Roids are not the answer. No need for them.
The most important thing is diet - about 70% of it. You gotta eat like crazy. Try 20 times your body weight in calories. Good, clean food eating in 5 or 6 meals. At 16, you're still in high school so breakfast, morning break, lunch afternoon break and dinner......maybe a meal before bedtime; but EAT!
For lifting, start lifting the compound lifts - deadlifts, atf squats (ass to floor), bench press, bentover rowing, pullups, standing military presses, etc. Doing the compound lifts while eating like crazy will help you put on size and get much stronger, as well.
I'm doing a routine that uses only compound lifts and my bench has gone up more that 50 pounds, my deadlifts up more than 150 pounds; squats, I just started going atf and I'm up to 275 pounds on those (up about 100 pounds). I've managed to put on some noticable size, as well.
Don't worry about how your bi's look compared to others. Right now, get big. Then you can cut back and work some on definition. There are guys here that only work bi's every other week and they're freakin' huge.
By the way, I'm 42 years old and have put on 16 pounds in just over 2 weeks. I've only added about 1.5% bodyfat. If I can do it, you certainly can, too.