How do you bring up training in an interview

So I scored an interview as a fund accounting manager in P/E but I’ve never done P/E just hedge funds for 10 years which have a lot of similarities. Last thing I wanna do is take a job that they feel I’m supposed to know everything from the jump. They have a controller, CFO and senior right now so they are building out the team.

How do I make it explicitly known I’ve never done this I know the concepts very well but I need to learn the fund before I can manage it. Whats your training like?

Not trying to fall flat on my face