Beta Sigma Phi was founded, in part, because many women had to give up educational opportunities due the difficult Great Depression. Our founder saw that women needed cultural and educational experiences along with a sense of sisterhood. It's a good option for women who are looking for those things (opportunities to learn, serve others, and make lifelong friendships).
You can find more information here:
http://www.betasigmaphi.org/Prospective_Members.php
However, if you are looking for the collegiate sorority experience, Beta Sigma Phi will not meet those expectations. You could check out a chapter and see if the sorority holds what you are hoping to find.
DubaiSis is right. We do have online chapters. I've been in two different land chapters, and I've been a member of Online Kappa since March 2003. It's been a fantastic experience.
Keep your options open.