Does it matter what email addresses students use for the site? I used to make them get gmail accounts for this course in order to more easily use the Google site, etc. but I may not need to do that now.
It doesn’t “matter”. I did set up Google authentication, so they can log in with a Google username if they want. You could invite them with their UGA address and they can change it after they log in, though I probably need to check just how that works.