[ChioLu]

1) Look up the Greek Life or Panhellenic website of the school you'll be attending. Read through the entire site. If the school has a Spring Open House, register & go to it (if travel is feasible). For instance, UCLA has a Greek Open House weekend around the start of Spring Quarter. Contact the Greek Life Office with any questions.
2) Google the Alumnae Panhellenic Office of the closest large city or county. Per your username, you are probably in California. So, say you're in Santa Monica, search "Los Angeles Alumnae Panhellenic". Lots of helpful information there no matter what school you are attending. If they have a sorority information session this spring, definitely register & attend. You'll find the info you're seeking.
3) using the search on this site, look up your school. It will find threads with a cornucopia of helpful information!