The new semester starts tomorrow so I thought I'd share some useful advice on how I made friends during remote learning from scratch - I just finished my first semester at a new university taught entirely online so I haven't met anybody in person nor have I set foot on campus
1) Send emails introducing yourself to ppl in your cohort. I emailed the other two PhD students starting with me after we attended our virtual induction and started a group chat. I also emailed another student whose work I knew of already and started a friendly chat using that
2) If your class doesn't involve breakout rooms, ask your lecturer to perhaps introduce them. I am taking German and 50% of the class takes place in breakout rooms. It's a place to vent, laugh, and make the small talk that normally happens before/after class
3) For classes that can't have breakout rooms: I asked a lecturer if they could put my email in the zoom chat during class if anyone is interested in starting a group chat. It worked, I hadn't spoken to anyone during class but we were all in the same boat and now the chat is lit
4) Ask your supervisor/lecturer to put you in touch with others in your department - particularly those who have similar research interests. Trust me when I say I get so excited if someone new emails me asking if they want to chat, and others probably feel the same