Hey there, congrats on the interview! Since they are non-rolling, it shouldn't hurt you to choose a later date since you've already got the invite. If it will make you more comfortable then by all means go with it (I scheduled my state school first when I got the chance and it helped a bit with the nervousness). I will say that as long as you can comfortably talk to a person, I don't think you have anything to worry about. I had had a few traditional interviews at other schools before coming here, and while each one of those had one nice guy and one hard*** (tbh), at WCMC they were both chill, low-key, nice people who knew my app well and everything was casual. No curveball questions or ethical dilemmas. Also I definitely recommend the morning session, it was amazing to roll in, go to two interviews and chat with other interviewees, then be completely done before lunch and just have a nice relaxed tour (spoiler alert I saw my first cadaver on this tour).