Who says you will meet many people naturally? It's ridiculous! I tell you from my personal experience that there is a serious polarization between these two levels in universities. One is, like you said, to join the student union and be busy all day, because at the beginning, I was a small clerk, and I needed to do a lot of work, and I did deal with many people. The other, who basically stays in the dormitory, is the classroom-restaurant-dormitory all day, 3: 0 1, and spends most of his time surfing the Internet in the dormitory, which is the legendary otaku! This kind of person can't get out. Who can you know? So it's definitely not natural, the key is how you do it yourself! The communication in the university is really extensive and diverse, and everyone has it. You will know when you go!