lol
depends on school
at my school, I full fucking dressed up and shit (they told us to), waited for 10mins while my interview was being delayed, then proceeded to sit down with a head teacher as she says "yep, yep, yep, good marks, yep, subjects will suit you well, yep". I spent an hour getting to and from school for literally that.
fuck my school
hopefully your school is a bit better, you interview may actually be alright. good luck with chem and legal (i wish i could drop both)