Play d4. If the Nc3 moves, you have Qa5+ and Qxe5 on the next move. Didn't the engine tell you?
Weird Caro-Kann Variation

I would've played ...d5 to ...d4 in that opening. White seems afraid to take central space with his d3 pawn move, so I (as Black) would've taken the central space for him.
For white, a black pawn on d4 is often an annoying thing.
Likewise, for black, a white pawn on d5 is often an annoying thing, too.
Both involve an enemy pawn invading one's position.
So, for a natural, simple (and easier to understand, perhaps?) way to play that opening, you could've done something like this:
Now we have an interesting game going. White has the bishop pair, but black controls more central space. Both sides have interesting ideas to try for.

I would've played ...d5 to ...d4 in that opening. White seems afraid to take central space with his d3 pawn move, so I (as Black) would've taken the central space for him.
For white, a black pawn on d4 is often an annoying thing.
Likewise, for black, a white pawn on d5 is often an annoying thing, too.
Both involve an enemy pawn invading one's position.
So, for a natural, simple (and easier to understand, perhaps?) way to play that opening, you could've done something like this:
Now we have an interesting game going. White has the bishop pair, but black controls more central space. Both sides have interesting ideas to try for.
this is of course playable for black but the picture isnt quite as rosy as you paint it, you playing agaisnt a KID where your opponent has an extra tempo. Not only that, white will get the f-pawn rolling before blocking it with a knight most likely. Dont let the eval bar fool you, it can be quite dangerous.
keeping a d5-e5 duo for black and only pushing d5-d4 when absolutely sure is a superior way to advantage.
I was recently playing a game as black using the Caro-Kann defense and came across this weird variation that gave a weird engine response in the review that I can't seem to figure out why it is the best move as opposed to mine.
The game starts fairly standard with 1. e4 c6 2. Nc3 d5 3. d3 and then I went e5 instead of dxe4 to end up with this position.
Supposedly this was a mistake. So when I went to check the best move, Stockfish said that the appropriate response would have been Nf6 instead and I am lost as to why since it seems to just hang my pawn on e5.