My son is in his first year at The Queen’s College studying Japanese, so he was in your position last year. He really enjoyed his interviews! He was at a state sixth form and got little help with interviews from school, however we did have a lot of discussions at home. Obvious things like know your personal statement, know all about any books you have mentioned. Perhaps research your interviewers, I don’t know if that helped much but might help with confidence. I can’t tell you specific questions he was asked but try and forget the enormity of it and enjoy chatting with incredible experts in their fields, they were all really friendly, my son was even laughing!