Questions about recruitment at University of Alabama

[greekcurious]

Hello!
I recently got accepted to University of Alabama and I am so excited to possibly become part of such a wonderful school in the fall. I definitely want to rush. I think I have a general idea of what rush is like, but I have a few questions.
1. I am from the northeast and have a 2.81 high school GPA (as of now...I think it will go up between now and the end of senior year). Will this end up hurting me? I've been looking on these forums and it seems like when sororities look at PNM's general profiles, a low GPA could harm me before I even get a chance to rush.
2. What exactly are letters of recommendation and how do I get 2 for each sorority if I hardly know any Greek alumni? Also, can they be Greek alum from any school? or does it have to be Alabama? When should I go about finding/sending out these letters of recommendation?

I hope you guys can help me out here! Thanks so much!