I have been very interested in this since I dropped the last of my religious beliefs as it is s great way to talk to people and get them to explore their deeply held beliefs without our and our confrontation. Anthony Magnabosco’s videos helped me loads in analyzing my own beliefs in fact. Check out his channel for yourself. This is a link to one of his videos.
He’s pretty good, in that he gives tips on style and atmosphere as well as content for the interviewing technique he uses to approach people. It’s very important to keep people feeling at ease and not under attack while you lead them through how to reason through their beliefs.