You know, to be completely honest. I feel you.
When I first signed up on Airsoft Arizona (previous username, no idea what it was), I was about your age and I could not understand why it was so essential to be 18.
I know I'm not the first to tell you; but being young just sucks, no ways around it.
It seems like everything is a build-up to 16, then 18, and when you're 18, you're still just under 21
You may be a very mature 14 year old, and I personally know a lot of adults that act about the age of 9; but it doesn't change the fact that not only are you a liability, but it's also poor practice.
Just wait it out, stay focused, and get involved when you're allowed to; I know it's not the answer you're looking for, but fussing about it will bring you no results and will only leave impressions on others that you're impatient.