Awhile back I started a cherry file cheat sheet. Check out http://www.giuspen.com/cherrytree/
First, basic not so obvious basics.
While Arch Wiki is among the best documentation on the net, there is good info from many sources that is applicable to most any linux, AND there is general and specific info from everywhere that is applicable to NOTHING! This is why DuckDuck is irritating to me without a useful date filter. I usually search for issue fixes only with a recent filter of some kind, like within 1 year.
Next realize that ALL search engines are as flawed as recent political thinking - it is ordered by POPULARITY with an overriding pay to play placement...In other words, searching is closing in on useless. The answer is on a page references by a page listed on page 17 of the search results.
The last referenced reference is sitting in front of you. Ask your computer! Learn to use man and info and -h, --help, and dig around with a file manager for readme's and the like. Most distro's package extra documentation as optional, so install some if needed.
So tie it all together! The most readable and printable documentation are the ones made by YOU! So with cherrytree, or some other favored app of the like, start writing your own cheat sheet structured and worded in your way, gathered from wherever you find it. Mine is 3-4MB of all text, requires me to use search it's so big. If you'd like to include screen shots then it will balloon from my tidy size. The magic of doing this is the simple exercise of absorbing info and re-framing it in you mind does wonders for learning. The exercise itself sometimes means you don't need to reference it again. Simply reading it once or twice isn't the same as translating it back out. It's known that simply writing things down imprints memory better than reading it. Go the extra mile and organize your own document and you will recite this stuff in your sleep.