Looking for recommendations -> Customer Development Workshop
Schools or workshops where people actively learn Customer Development techniques including how to interview and how to find people to interview, looking for live workshops, not books and videos.
I found a lot of local workshops near me that helped me learn customer discovery, polish pitch decks, and make MVP's. If you live near a university they usually host a lot of workshops as well and you can usually just buy a ticket or sign-up as a mentor.
Hope this helps!