Hi Forito... Your enthusiasm about sorority life is wonderful, and I'm really glad to see it. I believe I read in another post that you are in ninth grade, right? If that's the case, then I'm afraid that there really aren't any sorority events that you could attend right now -- unless you have an older female relative who is already a collegiate sorority member who could take you to visit some of her sorority sisters and allow you to get to know the girls.
My suggestion at this point is to visit the websites of all 26 NPC sororities in order to learn a little bit about each group's history and what they stand for. That will start to get you prepared for Rush in a few years.
Good luck with your research!