Even though it'd take longer to get the information they'd need, most folks would do better to buy a Chilton's manual or the actual shop manual for what they want to work on. The majority of YouTube "mechanic" videos are performed by some seriously shady tree "mechanics" who can easily get you into trouble that you'll likely have a hard or expensive (or both) time trying to get back out of.
Sadly, most of those info resources barely exist anymore. All the dealers have gone to online manuals, so there’s nothing a customer can buy there anymore. And the aftermarket manuals I’ve seen lately have barely enough info to be called a manual.
And even if they did, these days each car's service manual is more a set of multiple volumes rather than one book. I happen to have a dealer service PDF manual for my 2007 Jeep, and it’s over 8000 pages!
Now for sure, I can see the elimination of about 2/3rds of those pages because of how technicality deep some of it is. But the current level of complexity built into modern cars just simply requires a lot of info to troubleshoot on your own.