There's a lot of topics here, and we don't necessarily have links to start executing on them. For instance Authorization is an incredibly difficult topic to master for anyone to master. In this domain, I can offer some advice, like linking to a specific article:

Authentication & Authorization: what's the difference overview.

Or more specifically go into a topic a lower more technical level: Here’s an example authorization integration that you can use.

Know what I mean? I’m sure there are lots of suggestions for each one, but having a dedicated article to elaborate on would be really helpful.