Remember, that we all have different genetic traits. Some guys have more Type 2 fibers in theiir chest, back or whatever, and won't have much of them in their arms, or forearms, etc.
Don't beat yourself up.
You're a kid. Just 16.
You've got plenty of time.
Just don't be so over zealous and eager that you do everything wrong, andnever get results, and eventually injure yourself.
Don't become one of those guys that always say :"Yeah, I used to work out. I used to be buff, dude."
Do all the things the guys say to do on here, You'll do fine. Don't try to hurry up the process.