The interview is a vibe check first and foremost. If you vibe with the team we will overlook other things in your application. If you made it to interview, we already think you're good enough so don't stress trying to impress or apologize.
Managers are mostly people who get tired of watching other people do things badly and decide to try to do better. You don't need a special degree or any magic to be a good manager, you should like people though.
Everyone is faking it to some degree.
The location of the wreck wasn't found until 1985 and it was definitely still a popular disaster story to tell. I remember books about it in my elementary school library in the late 1980s alongside volcanos and dinosaurs.