I think the described processes are quite an effort and seem to imply a black and white world: no notes versus a personal intranet of your mind. I'm looking to

I think the described processes are quite an effort and seem to imply a black and white world: no notes versus a personal intranet of your mind. I'm looking to augment my process but I've started with a simple approach: markdown notes, scripts, and lately my own diagrams (made with excalidraw or plantuml). The most common scenarios when I write: learning something new or when I've had to search/type a command for the nth time - time to write it down or create a script for it.