Boosting this advice. When I started using Linux as my daily driver (14 years ago), I got into the habit of taking notes on everything: troubleshooting solutions, bug fixes, how-tos, configurations, useful software, etc. It’s not the Arch Wiki, which is a treasure, but I can solve a lot of my own issues just by looking up what I’ve done before.
This seems like a golden opportunity for distros like Suse and Ubuntu, who offer enterprise support for their free product, to poach some RHEL customers.