I guess we're flip sides of the same coin, at least as far as our opinions on ease of learning how to use and administer Windows 10.
I absolutely agree that Windows 10 is loaded with features I will never use, but that's been true for me as far back as Windows 7.
I have found Windows 10, on the whole, relatively easy to learn and mostly because of the help I've received in this venue coupled with the one new feature in Windows 10 that I'd give my eye-teeth to have had on earlier versions of Windows: Search functionality in Settings.
If you don't know where something is the search feature in settings makes it remarkably easy to find it and Microsoft has done a commendable job with having lots of synonyms for the same function work in the search to get you where you need to go.
Between that, and the ongoing availability of both Control Panel and the "God Mode" folder (though with the "invisible name" issue still unresolved), I've found that Windows 10 is very similar to it's predecessors.
Unfortunately I don't have any reference recommendations in the form of a book. I am far more inclined toward forum and/or web searches that I focus on what I need to do at the time I need to do it. I haven't come dry often, and when I have posting a question here or elsewhere has gotten me the answer(s) I needed in fairly short order.
Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1809, Build 17763
Presenting the willfully ignorant with facts is the very definition of casting pearls before swine.
~ Brian Vogel