I started a while ago now with that, I just wrote a bunch of things into a file as a time line, and it slowly got more and more useful. Then I found I had a bunch of info around various topics scattered through the journal, so I started making topic guides. My topic guides are super useful now. I maintain and add them much more than the journal. So, to my point, I think recording things is useful, but it's best done in an organic way, where you just try things and adapt what you do based on how you are finding it. The only other thing I'd say is it is actually much nicer, in my experience, just using files (backed up by your favorite drive syncing software) and no specific tools. I also use markdown, but doesn't really matter.