So there does seem to be a recent Hype-train around improved note taking and Zettelkasten in particular.

I would 100% echo the timesink/tarpit comments insofar as unless you have a specific learning or knowledge management goal devoting time to this can be a fun procrastination game.

Many of the sources rate the book "How to Take Smart Notes" by Sönke Ahrens as a starting point (ISBN10 1542866502 , ISBN13 9781542866507)

There are a plethora of youtube channels and Productivity websites to be found so YMMV, I liked:

Bryan Jenks' - https://www.youtube.com/playlist?list=PL5fd4SsfvECy0zzf8Cyo2...

Justin (Effective Remote work )- https://www.youtube.com/channel/UCkzyo69rqBoBJUyQ9jo53Bw/vid...