Other people are looking for new friends too, as most come in with no friends, and Iโm sure will be happy to meet you. Just put yourself out there with the knowledge that everyone is in the same situation as you, looking to meet new people. I used to be really introverted before uni but now some people even call me an extrovert. You have so much to gain from societies so go to whatever interests you, to meet new people and participate in new activities, especially at this time of the year when the term is just starting up again! Even the people on society committees may have started out anxious when they first joined.
Only thing is some sports societies might be more competitive and may be teams only, but there should still be plenty that are open to beginners if youโre new to the sport.
Many people seem to only come in for the lectures and leave afterwards. But for those who do get involved in societies, uni goes from just a place for learning to a place of great fun too, which makes you look forward to every day :)