Congrats to you! In my experience (CRNA for 3 years now) with the interview processes (went on 3) you will be asked the obvious: Why do you want to be a CRNA… and then (again, speaking from my personal experience), you will be asked about yourself, strengths and weaknesses, and challenging cases you have had. They will also likely try to test your knowledge of physiology, pathophysiology and pharmacology in some way.
The best you can do is be confident, and prepared for demonstrating your Critical Care knowledge and experience. This is why it’s best to have more than just a single year of CC under your belt. Schools and Programs are highly competitive, most of the applicants they receive have similar qualifications, and the spots each year are limited. Do your best to stick out. Best of luck to you.