First off, know that you’re not alone! I was asking this yesterday on the Parents of 2020 FB page just yesterday (for my S, of course).
Most high school students are still waiting to hear on acceptances from schools, so right now the pool is much smaller than it will be in Spring. Also, girls are usually more quick off the mark to get their roommate situation lined up than the boys.
I don’t know that the housing page will be much help- looking (over my S’s shoulder), most of the boys’ bios were pretty terse (usually little more than “I like playing XBox, and being chill. Roll Tide!”). Again, something I think girls recognize is more important for roommate selection.
The best way (I think), short of actually knowing people going already, is to join the FB University of Alabama Class of 2020 group… but to make things confusing there are at least 10 groups named “University of Alabama Class of 2020”!! I can’t tell you which to join (because not being a student, I haven’t joined any), but the one my S was directed to (by the D of a parent in the parents group) has Denny Chimes and cheerleaders with the A flags on the home page.
Post an introduction post, prowl through the other members- send messages, make FB friends, chat. Remember you don’t have to be best buddies to be good roommates, and in fact, depending on personalities, you may not want that. But usually finding some common interest is a good starting point.
Also, don’t assume that good roommates have to have the same major! It’s good to have study buddies, but college is also about expanding your horizons. My S went down to Honors Academy this summer for a week. At the time, he was planning to be a Biology major (he’s now going to try Environmental Engineering to see if it’s a good fit), and had as roommates a Business major, an Electrical Engineer and a pre-Law Government Studies. Their day time schedules didn’t have much in common, but they all got along great. They had meals together, and at the end of the day played games.