I don't like the Caro. It's overrated and it's slow. Better is to play the French Defense. I have the more common variations covered here and you will get more out of this study than by playing the Caro. I also included a tricky variation that will have you win a lot of games
Very incomplete!
For instance, in the 6.Be2 line after 6...f6 7.O-O, etc, on move 10 (shown as move 5 there because when you click 6.Be2, it goes back to 1 rather than 6), White has 2 main options. 10.c4, as shown, but also 10.f4, which is the more positional route.
I smacked Black silly in the Chicago Open back in the mid-2010's with 10.f4 (yes, I was White that game - I do not only play the Black side of the French, I also play the White side of the Advance, 3.Nc3, and King's Indian Attack).
I prefer the Scandinavian. More winning chances and fun games.
And I think people sometimes forget that black isn't forced to play Qxd5 immediately.
2. nf6 is eh
1...d5 is eh (and that's being generous)