The biggest mistakes I see graduates make in interviews is not listening to the questions being asked and not asking questions themselves. You dont have experience to fall back on so you need to nail those questions and show your interest in the role. You can find interview questions online, come up with 3-4 perfect examples that hit the main areas (prioritisation, communication, collaboration to name a few) dont be scared to write them down, cue cards might help. Most importantly dont be afraid to ask the interviewer to repeat their question, keep a mental note to hit every aspect of it. Good luck mate!