Start with a search through the videos of the following people, Dr Jason Fung and then Dr Robert Szabo, continue onto Dr Stephen Phinney and Dr Rhonda Patrick. Also look at the talks done by Benjamin Bikman PhD. Through these individuals you will find a trove of information that will blow your brain box!
Best of luck to everyone on their journeys of health and self discovery.
Fung is great for help in breaking down propaganda against fasting and the dogma of CICO.
Phinney has been a pioneer in research related to ketones as fuel, but is rather skeptical about longer-term fasting. He seems fully on board with IF though.
Bikman is a delight, and great at breaking down existing research in bite size chunks.
Patrick in less familiar with, but have heard her name thrown around a lot.