Piggybacking on this to say that if you join groups based around your hobbies you can make good friends that way too. It’s really hard to make friends during class because you’re too focused on schoolwork to be social.

And don’t be discouraged if one group doesn’t work out. I had a tough time making friends my freshman year of college and tried joining an anime club but didn’t like the vibe of that club. My RA pushed me to volunteer for Resident Life and that’s where I made all my closest college friends. Joining clubs, volunteer organizations, or other social groups is a great way to meet similar minded people. People in these groups tend to be friendly so they can attract more people into the group.