14 is the average age for teens to get drunk, but doesn't mean you should...
I mean, i've never been invited to a party before but I hear my friends talk about the ones they go to and from the sounds of it they sound like shit. I have to put up with my mum and dad bringing their friends home and its annoying as hell.
Chances are if you don't drink then after a few hours when everyone is smashed you'll want to leave because drunk people can be annoying and unpredictable.
Don't get drunk, wait until your friend that's a girl gets drunk and she will volunteer to give you your first blowjob. And don't call me a statutory rapist, girls just want to have sex if they choose to get drunk at a party...