AV'ing is our (ASC's) equivalent of a PAL - it assures us that the person purchasing a gun is an adult (i.e., 18+) and is legally responsible for his/her actions.
Ontario's laws regarding gun ownership, including paintball and airsoft guns, requires that the purchaser/owner is 18+. If you are currently underaged, then it is technically illegal for you to purchase/own an airsoft gun, or for any of the retailers to sell you a gun.
On the plus side, you are only a few months from that magic threshold, so I would suggest that you just wait to get AV'ed. There are pluses to the waiting: you exhibit to us that you can be patient and mature about the process; you can continue to read up on what is available and how best to set up your equipment; and you can continue to save up for really decent guns/gears. Once you're set up, you'll be in good airsofting company.
Someone here once said that you're only too young for a short while, and too old for the rest of your life.