Hardware

If that is what you're looking for then I'd recommend watching multiple PC build videos, but not some few-minute montage ones. Paul's Hardware, for example, will, from time to time, do something along these lines where he goes right into installing the OS. Hardware Unboxed sometimes and even Optimum Tech will occasionally do this, too. But in the case of the latter even he can get a little too montage'y at times. These videos usually provide discussion into why parts were chosen, etc. That's about as deep-dive as a normal user needs and should give them the foundation they need for using observation to help diagnose things by elimination and/or isolation.

Anything more detailed is what long form reviews and architecture explainers are for when a processor or graphics card comes out. But after that is usually to the Reddit-mines to look for anybody talking about specific problems with a specific thing and/or it's firmware/software at a given time, unfortunately. Too many devices from too many manufacturers with too many things that can individually go wrong.

There's a chance you may already be seeing/reading these things you seek, but aren't quite recognizing them for what they are. Of course like car repair (and the modification/performance scene), though, professionalism will vary.