Interview next week for inpatient psych unit!

I have an interview at hospital next week for thier inpatient psych unit. I am excited, however when I spoke to the manager she stated that they were looking for PT that could lead into FT. I made it clear that I need to work FT. She suggested to do the interview anyway. I am hoping maybe she would hire me FT anyway if she knows that she will have a need in the near future. So what can I expect at this interview? I did a year of med surg right out of nursing school and have been in community health since then, however my entire caseload are people with severe and persistent mental illness. However, I do medical nursing needs for these people, so I have no psych nursing experience. But I am bored out of my mind at my current job as I mostly babysit home health aides and take VS . I have really taken an interest in psych nursing since working with these people. Any advice for the interview? TIA!