It might be a challenge for a person from a very liberal area in New England, such as Massachusetts or Vermont, who is liberal & progressive to adjust to the University of Mississippi. Most 18 year olds are at a very sensitive stage of life and skills in adapting and accepting may not yet be fully developed.
Mississippi is a conservative state. The University of Mississippi is about 78% white, 12% black, 2% Asian, 4% Hispanic, 2% multi-racial, and 2% international.
56% are from in-state. Not sure how many of the remaining 42% ( 42%, not 44%, as 2% are international) are from neighboring states, but I can assure you that Ole Miss is not over-run with liberals from Massachusetts.
Best to be open-minded & accepting of others & their points of view just as one would like others to be toward him or her.
Attending the University of Mississippi just because it is inexpensive is probably not enough. Need an academic or other compelling reason, in my opinion, if a progressive liberal from Massachusetts who has already labeled herself as not Southern in looks, actions or experience.
This is not the case at most large Southern universities, but, in my opinion, Ole Miss retains more old South qualities than do the other SEC schools.
Greek life is important at the University of Mississippi as one-third of all males pledge a fraternity & a bit less than half of all females join sororities.
Most important to visit while school is in session & to sit in on a few classes in your area of interest.