United interview was one of the easiest interview I’ve done. I know a lot of people recently who have skipped the interview prep services and all got cjo.
I would recommend aviation interviews.com. Get a story ready for every questions, answer all questions with the star method. Study the technical packet and your own airline procedures.
the rest is common knowledge we use every day.

it’s very laid back interview and there’s no trick situation. Answer all tmaat questions with your own stories and they’ll love it.