A little background information, perhaps... (You've done enough installing for one day, eh?)
"The Windows that you know and love"
is a tightly-coupled
architecture. Everything fits and works very closely with everything else, and you can't separate things easily; nor are you given much opportunity to omit things. It is, to be sure, a very carefully thought out "one choice," but there's only one way.
on the other hand, is a (very) loosely-coupled
system. In other words, it's piecemeal. The various pieces fit together very well indeed, but you have many choices ... you can include things or omit them; you can choose between many alternatives. You have a cornucopia of choices where Windows gives you none at all.
This would be a great time to grab a loose-leaf notebook and start keeping a diary.
When you have a question, write it down in the notebook, leave space for the answer, and then, "let it go" for now.
You're going to have way
too many questions, way too many unfamiliar things, to be able to "chase them all." So, write 'em down (I prefer longhand, in pencil) and let 'em go.
And, uhh, pet
the poor pooch. Dog food would be nice.