I really don't know what to say here. Kissing is a skill most people acquire when they're about a year old. Yes, it's different when you're not kissing someone in your family, but just don't dwell on the fact you have to kiss someone and you'll be fine.
Honestly, it just comes naturally. Sure, you want to get that first one out of the way (I did in elementary school...hehe) if you haven't already. But it's not hard at all! You just have to, well, not try, if you get my drift.
Also, there is nothing wrong with wearing glasses. My senior year of high school both the homecoming king and queen wore them (although the queen wore contacts most of the time). Just as long as they're not Coke-bottle glasses you'll be fine.