I bought a used book for passing the nursing entrance exam.
"Review Guide for LPN/LVN Pre Entrance Exam, Second Edition (Review Guide for LPN/LVN Pre-Entrance Exam) by Mary E. McDonald"
It was a good review for basic math and grammar. I passed two entrance exams at two different schools so I think it was worth my time.
As for the interview: I wore a suit and was really nervous, but it went well. It was an informal meeting with the director of the program. I don't even remember the details or questions. You'll do fine.