Prepping for PE Interview w/ No Experience

Hey everyone, I recently got an email to interview with a very high-level employee of a small PE shop for a SA position. The interview is going to be in a few days and I'm freaking out because I have no finance experience/knowledge. I've never had a remotely finance-related internship or classes for reference. Aside from probably cramming the BITWS guide, reviewing how to build an LBO model, and practicing basic technicals, is there anything else I can do to prepare? Is that too much work for the next few days and should I only focus on a few topics? I don't want to completely embarrass myself. Thanks!