Interstellar is one of my favorite movies, and I've seen it several times (always on a small screen, unfortunately). If you really want to nerd out, I recommend Kip Thorne's book, "The Science of Interstellar."

I read it many years ago, and recently while watching a Nova episode on the solar system, they were talking about tidal heating of a moon, and I understood the general idea thanks entirely to Kip's book (tidal gravity was why Miller's planet had gigantic waves).

Kip also explains in great detail why the black hole in the movie has what looks like two perpendicular rings of light. Now, even the Star Trek cartoon Lower Decks depicts black holes this way, but Interstellar was the first movie or TV show to put this depiction of black holes into the mainstream.