I love Jason Fung, but I have also been reading the book “fast, feast, repeat” from the library and find it more of a how-to book than the advice Jason gives, although Dr Fung is amazing at explaining the science of why it works. I also like the “Fasting for Life” podcast.
https://open.spotify.com/episode/2ZdOl4cO0F2fsPjssJagbj?si=30b62834ed974b25
this podcast is a very good introduction, doesn’t require any existing knowledge about IF. It’s pretty lengthy, but well worth a listen
Huberman Lab, Episode 41