Good luck lavender333! All of the above advice is excellent! Adpiucf definitely knows her stuff!
The best thing I can add is to simply relax. So many times, PNM’s stress out and worry about how the process works, what to wear, and what everyone else thinks. Just let it go! Have fun and take things as they come. All the chapters are filled with wonderful women. In my opinion, you really can’t go wrong! You’re going to have an awesome sorority experience no matter what group you end up joining. <Getting off Pan soap box>
Also, whatever you do, don’t forget your umbrella!