So his YT videos are full of great information, but it’s horribly unstructured.
His accent makes the transcripts pretty much useless, too lol.
He has a book https://www.trainedbyjp.com/jpebook/ that you could pay for and access more of his info, or you can find it free for download in… places…
But you can also get more concise info in this thread, starting at this comment
Its when i first heard of it.