I got on the accountancy course next year, go me!

[Maca]

First of all, congratulations! That's a huge accomplishment, considering you're only 14. Wow. Here I was thinking that I'm 17 and still young to be a sophomore.

For the interview, the first thing you would need to do is shake the interviewer's hand. It would be wise to bring a handkerchief. Touching/scratching any part of your face may be taken as an attempt to deceit. You can use the handkerchief to scratch instead of your hands. Avoid monosyllabic expressions like, "uh" or "um". Dress neatly, but don't show off. Talk to the interviewer like a teacher, not like a boss so you won't get nervous. Of course, be polite. Be confident, but not overconfident.

For the issue with friends, I'm sure you can always make new friends there. It's good to keep old friends but they don't have to be your only ones.

Thanks for this advice so much!
As for the dress neatly part, i have to wear my school uniform

And yet again, thank you!