What are some good resources that explain how to use Insights / write custom narratives?

Hi team!
Can you please point me to good resources that explain how to use Insights / write custom narratives?
I am looking for some tutorial that covers the different type of calculations and what is the dataset schema / columns / datatypes we need to have to use them.
Also, any tips/recommendations on how to easily write custom narratives.

If you start here you can go down a rabbit hole that explains a lot.

The demo central is also a great place to learn about tips and tricks in general. I’m sure they have something on narratives.

https://democentral.learnquicksight.online/#Dashboard-TipsAndTricks-Visual-Bar-Conditional-Formatting