Hi Jen!
Just some info... I started my own sorority on campus and it was a lot of hard work and dedication. First, I looked into what I needed to do to be recognized on campus, then I started gathering interested ladies. Throughout this, I was researching organizations through the internet (I was looking at non-NPC orgs.). Based on the responses, the group decided on an organization and began working with the expansion director.
Have you looked into what it takes to start a new club/org on your campus? How does your campus feel about bringing in a new sorority? Of course there is more to it than that, but just a little info for you
Hope it helps!