don’t understand why people are being so unnecessary here 🙄 to answer your question, i know it’s probably not the advice you wanna hear but i think your best option is just to throw yourself in at the deep end. i was in a similar position where i didn’t really know how to talk to people whatsoever and what helped me was getting a volunteer job. it was mainly interacting with adults but regardless it helped my social skills a lot. whether you decide to get a job before university or just wait til you get there is up to you, but i think as hard as it is the best thing you can do is put yourself in an uncomfortable social situation