Knowledge Bank - Your Second Brain (Digital Tool)
If I could go back and change one thing to ensure more success faster, it would be to have a better archive of what I have learned.
The freedom book and second brain are your commitment to accumulate wisdom, rather than being a knowledge junkie.
Notion is by far the best tool I've found.
Obsidian had a simplicity to it that I like.
Bear is another option if you're looking to browse.
They are between free and a few dollars a month.
Evernote is another in this genre that I tried in 2015 or so but it didn't stick for me.
Notes app on the phone & laptop would be my second choice to one of these.
Google docs would be distant third option. If you're using google notes extremely successfully.