You should definitely check out their Greek Life website here:
http://www.nicholls.edu/greek/
And fill out the recruitment application here:
https://secureapp.icsrecruiter.com/I...spx?UID=NISTUN
Rushing with a friend is fun, as long as you don't get your hearts set on joining the same sorority together. Sororities might feel iffy about taking one but not the other in those sorts of situations. It's always good to have a friend there for the emotional support, though. I'm sure you'll meet many new people in your recruitment group. I'm still close with several girls from mine.
I don't know anything about Nicholls State, but I can give a few general answers. As for your age, it really depends on if are there a lot of non-traditional age students at your school and in Greek Life. Are you going to be a freshman this fall? Is this your first time in college? Are you married or do you have children? If you're an upperclassman or pursuing a second degree, this might have a negative impact on your recruitment. If you are married or have children, keep in mind that being in a sorority is a huge time commitment before you decide to go through recruitment. Other than that, I can't offer you specific advice without knowing more of your background.