I've been rewatching the original series on Netflix. I've got a few episodes left, and then I'll start the new series. I'm really excited to check the new series out. It's difficult to watch some of the original episodes from after the killer was revealed at the beginning of season 2. There's a lot of wacky, corny stuff in the second season.
I also would like to watch the movie. I've never seen it, but Lynch said people should watch that before watching the new series. It's kind of impossible to locate, though. It's not on any streaming services as far as I can tell.