Oh lol I thought it was tomorrow because you mentioned looking for uber rides tomorrow. Good luck!
The interview day is really relaxed. Make sure to greet the staff and introduce yourself to them. The student interviewer isn’t looking to crucify you, just get a good feel of whether you would be a a person they could see themselves working a PBL session with. From my experience and after hearing from others, some of the faculty interviewers specifically try to hide their emotions and reactions to what you say. Don’t feel discouraged if they don’t make eye contact/outright agree/or otherwise lack affirmative body/verbal language. That’s just how some of them comport themselves in the interview.