First IB internship interview

Hi,

I'm doing my first IB internship interview (in Europe) next week and only have a few days to prepare for it. I am so nervous and not well experienced at all, I don't even know how i ended up getting an interview, I guess I'm just lucky. However to the point, does anyone have any tips in preparing for it? Since I only have a few days I don't know how I should be able to have the time to learn everything for the technical questions, I've done some research but I have no clue how I should prepare in order to not make a fool out of myself. So basically, I am really bad at all finance and accounting stuff, however, am really eager to learn and it truly interests me and this internship would mean the world to me. Of course I know some basics, but it's far from enough for the interview. Just need advice for anything, my confidence is not on top neither as I feel I will just make a fool out of myself...