(Honesty I'd say first don't , as I didn't really date unill over 21, and I am happily married now, )
I think if those are only 18 then it should say in the description as such, sometimes there will be 2one 18 and over and a everyone. One thing that can help is the badges are color coded for age cuz I know at a con it can hard to tell age, if you see a girl you want to chat with, that has a badge that looks like yours and your good to go (+/-a few years ish) but I would dff recommend aim for friendship in a con setting, its safer and can always grow later, goid luck