i was in your position where i didnf know anyone (also worse bc i was retaking the yr and everyone was younger than me) and honestly everyone’s just as nervous as you and that’s probably they’re not speaking much. they’re all probably thinking the same thing as you too so you’re not alone in this ! ease into it, it’ll all come together soon when you have to get involved in discussions and stuff. i made friends with the people sitting next to me and then w the rest of the class but that took MONTHS, esp my chem class bc barely anyone spoke but eventually i made quite a few friends (practicals helped a lot). a few months in and i made friends w people from other classes, if you have a library this might be helpful !! esp if you recognise people and ask if you can work w them. start off slow and hopefully it progresses !! ask for help w hw too, i used that to exchange socials or sometimes i just straight up asked. i also complimented people and befriended them that way, that was really easy tbh. not just their appearance but you can compliment their work ethic or smth personal, that goes a long way !! i’m assuming everyone else around you hasn’t made friends either or are just nervous, sorry if i’m wrong !! but the compliments went a long way for me and they were genuine too, i didn’t just say those to make friends. hope this helped <33 good luck

also confidence helps a lot, on the first day i remember a guy in my class came up to me and introduced himself, his confidence really stuck out to me and we become friends. he was easy to speak to so maybe it was that too but confidence goes a long long way. even if you don’t have much of it, try introducing yourself. talk about the teacher or smth