This is in some places a little bit specific to Lit but mostly not and walks you through that shift in mental models from start to finish that tends to trip people up a lot coming to Web Components https://youtu.be/Xt7blcyuw5s

FWIW if you are interested in Web Components I would say Lit is hands down the best entry point I’ve come across. Strong recommendation and nullifies most of the common complaints you tend to hear associated with them.