Good starting point could be reading the white paper by Satoshi Nakamoto, you can find the pdf online. Otherwise nostr:npub1s33sw6y2p8kpz2t8avz5feu2n6yvfr6swykrnm2frletd7spnt5qew252p has a tonne of great and short explanation videos on YouTube, he has a playlist called bitcoin for beginners, and explains things calmly and clearly.

If you’re real about finding the knowledge you will find it, give it time, it’s a lot to take in. But boi does it pay off.