Parker’s gradually then suddenly series. I normally send friend’s to nostr:npub1h8nk2346qezka5cpm8jjh3yl5j88pf4ly2ptu7s6uu55wcfqy0wq36rpev audio version of those. Good summary and fairly quick to get though each topic.

I also just found nostr:npub18kpw3akvdsyk239lx0jgwksr74sq4nlha3r8u9g2rnrhztfpfhysy469c4

Last week and their site is great and easy to find answer to specific questions.