Black response to D4

easy to learn openings against D4 for black avoiding the queens gambit?

You might want to check out the Slav!  It's very flexible and does not usually require sharp responses.

thank you!

i thought avoiding the queen's gambit meant not playing d5 early, if at all.

Oh, good point.  I think that's up for a little bit of interpretation from OP then on what his intention is.  Still, I would argue that the Slav is very easy to learn and is probably worth heavy consideration in that regard.

Slav is just a variation of Queen's Gambit declined though?

Anyway, maybe the Classical Dutch with a 1. e6 move order might be for you (possibility for French transposition so if you're more comfortable with e4 positions there you go)

Why would you want to avoid the Queen's Gambit? There is no reason to avoid it.

Stylistic reasons, though you'd need to be much further advanced to claim that.

Simple Defense to 1.d4 that does not allow the Queen's Gambit is an oxymoron!  The Dutch, Modern, 1...Nf6 openings, etc are all far more complex than 1...d5, which allows the Queen's Gambit.

Since the O.P. mostly plays 1.e4 e6 2.d4 b6 against 1.e4, he can well play the same against 1.d4.

It's not a terribly good solution, but this is not important, as all his rapid games I have reviewed were decided by mutual blunders.

Related question: what opening would you recommend for beginner players (~1000 level) playing as Black against 1.d4 2.c4?

I have experimented a bit with a variety of different things QGD, Slav, Semi-Slav, Marshall Defence, London, East Indian, King's Indian. All of them seem okay but I can't seem to settle on anything and feel like a jack of all trades, master of none.

I think it is good to get some exposure of different openings but would now like to choose a standard response and get good at winning with it.

As a 1000 player?  Definitely the QGD.  It, along with the Ruy Lopez, basically follows opening concepts to the letter!

I'm new here because I just moved from trash lichess (username stockfishjaws) my repertoire against 1.D4 is: If Queens Gambit I play Albin countergambit, if the London an early 2.C5 sacrificing a pawn to put 2 pawns in the centre. Gothamchess covers both of these openings on YT.

BTW I'm loving this website, the forums are so interesting.

Agreed.

I also suggest the OP consider the Queen's Gambit Declined

Mostly because it's moves are very logical and straightforward (translation: "easier to understand").

I completely agree Stil1.  The Albin countergambit is OP too, but like you said Q gambit declined is straight forward, that's the draw back to the Albin Countergambit. You need to know LOTS of theory and although there are traps, if you mess up in the slightest you might as well resign. But the opening is well worth it if you take time to study it.

QGA also grants equality, and insane opportunities against unprepared opponents. You can also stirr towards other directions (Grünfeld, dutch-like, KID, Slav, and so many more...)

Yeah, I tried learning Dutch but it was too hard as I hate the overall position in the Stonewall, the classical kind of relies on what line the opponent plays and  the only chance black has in the Dutch Leningrad is putting the opponent out of their comfort zone. I heard the Grünfeld was very strong and the Slav too.