What do I say about why I left my last job? - 18 weeks in

I have an interview next week and I am unsure how to explain why I left my last job as an office manager. I also do not want to seem like a risk.

Say it plainly and move on to what you can do. Interviewers usually move on if you do.

Practise it out loud with a friend. Mine felt natural after the third try.