I had my access course interview last week (although not for Nursing). It was very laid-back. All of us had to do a basic maths test first and then our interview consisted of a conversation with the tutor on a one-to-one basis about why we want to do the course, the modules we will be learning, how to best prepare for the year ahead etc. They also asked if I was currently employed and how I'd manage work and studying at the same time. I thought it'd be set up like a job interview but it was very relaxed! Best of luck.