Ask HN: Best Resources for Learning IPv6?

What are some good resources for learning IPv6 from (one or both of) a developer perspective as well as system administrator perspective?

What does one need to know when deploying it in production? How do most (or all) of the things I've come to know with IPv4 translate into IPv6?

What do all of the various terms and link-types mean and how do they work?

While I've seen https://ipv6.he.net/certification/ it didn't seem like it gave a solid grounding but was more focused on getting it usable. Perhaps I didn't make it far enough in.