HN user
Yeah start with https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-... Deprecating the unsecure&outdated/it's easy to shoot yourself and summarizing so you don't need to go through the rabbit hole of specs...
Also follow the BCP that will remain in a draft state forever(at least for the near future): https://datatracker.ietf.org/doc/html/draft-ietf-oauth-secur...
I have not seen a course that covers all of the things you are asking for.
The best courses on the oidc/oauth and saml I have seen were the paid ones here: https://www.hackmanit.de/en/training/portfolio
On linkedinlearning this one was quite ok: https://www.linkedin.com/learning/web-security-oauth-and-ope...
Free ressources check: -https://aaronparecki.com/
-OAuth 2.0 and OpenID Connect (in plain English): https://m.youtube.com/watch?v=996OiexHze0
https://speakerdeck.com/nbarbettini/oauth-and-openid-connect...
-OAuth/OpenID by Nat Sakimura(chairman openid foundation) https://m.youtube.com/playlist?list=PLRUD_uiAYejRvQWkS2xjgFW...
For the active directory topic I don't know good ressources
I could recommend https://github.com/panva/node-oidc-provider supports most of the oidc/oauth 2 rabbit hole specs.
Steve Krug's Don't make me think is one of the best resources on UI/UX https://sensible.com/dont-make-me-think/ I would put on the book recommendation list for a UI/UX Primer
Yes seems that we will not see it in the near future... By fun I sometimes go through the project of the cs255 course: https://crypto.stanford.edu/~dabo/cs255/
Dan Boneh's "Cryptography I". https://www.coursera.org/learn/crypto Was one of the best basic lecture I have seen on the crypto topic. I have enjoyed several lectures in my studies but some things I just understood after the good and interesting explanations in this course. Really amazing. Still waiting for the the Crypto 2 course.
If you understand german I recommend you math lessons by Christian Spannagel https://www.youtube.com/@pharithmetik. Makes some less interesting topics enjoyable.