Digital Audio for Dummies

As I have stated before, I'm a bit of an audio dinosaur.  I love simple.  I love reliable.  I love a high performance/price ratio.  So no surprise I'm still happily spinning discs.  Give me a nice CD player direct to an integrated and I'm good to go.

But it is 2018.  Reading on this forum about the demise of Oppo was a bit of a wake up call. Also the Lyngdorf 2170 has inspired me.  An elegant all in one box product that is ready to connect with many of the digital options now available.  So I'd like to get educated on what's out there and what you suggest.  Basically I would want to know about ripping all my CD's--exactly how that is done.  Dedicated audio computer?  How big of a hard drive/other considerations?  Wired vs. wireless.  And then what streaming services are out there?  Cost, quality, ease of use?

PLEASE keep things simple and don't assume the reader knows, for example, what Roon is.  I've seen it mentioned, but would want to know exactly what this does, how it functions, etc.

THANKS!