Interview Prep

Hi all, I'm currently a second year and applied to a fall part-time position at a boutique PE firm through my club. The first round was a case comp and I passed through to the first interview round. I have basically zero experience in PE and honestly don't know too much about the industry. But, I am pretty well versed with IB industry and the techs for it. Any advice on how I should prep for the first round? I have a few days and want to make sure I'm prepared well.