My D is a second semester freshman too, and she calls twice a day. It’s sad for me because I had so much fun as a freshman, and I wished that for her, but just getting through seems to be a goal far enough. So we don’t pressure her to “have fun”, per se, but we do encourage her to make lunch or dinner plans with a friend, and this semester she is trying group fitness classes. You have some good advice about finding a comfort zone and gradually working out from there.