Black openings (e4)

just play the petroff and mirror white if you don't mind drawing a lot

I gotta disagree with Petroff, man. No offense.

Its not a natural opening for OPs level. And if you keep mirroring your opponent in Petroff this is gonna happen sooner or later.

You are likely to see 4/5 common responses from white if you play e4. You can play Nc6 against both Vienna game and Nf3. If d4 happens, just take the pawn. Center game is nothing to be afraid of. Well I am sure you already know how to stop Scholars Mate attempt.

if your opponent start with an e4 that means this is an open game. there are different types of open games. if you really want to learn how should you play actually ı suggest you to try all openings. there is a list for you if you want to try

e4 e5 2.Bc4 Bishop Opening 1.e4 e5 2.d4 exd4 3.Qxd4 Center game 1.e4 e5 2.d4 exd4 3.c3 Denmark Gambit 1.e4 e5 2.Ne2 Alapin Opening 1.e4 e5 2.Nf3 Nc6 3.Bb5 Ruy Lopez or Spanish Opening 1.e4 e5 2.Nf3 Nc6 3.Nc3 Three knights 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 Four knights Opening 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 Giuoco Piano or Italian Opening 1.e4 e5 2.Af3 Ac6 3.Fc4 Fc5 4.b4 Evans Gambit 1.e4 e5 2.Nf3 Nc6 3.Bc4 Be7 Hungarian Defense 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 Two-Horse Defense 1.e4 e5 2.Nf3 Nc6 3.c3 Ponziani Opening 1.e4 e5 2.Nf3 f5 Latvian Gambit 1.e4 e5 2.Nf3 Nf6 Petrov Defense 1.e4 e5 2.f4 King gambit 1.e4 e5 2.Nf3 Nc6 3.d4 Scottish game

Play the hyperaccelerated dragon for a fun game.

Here's a simple plan:

e5-Nc6-Bc5, this can be played against most things although sometimes there are better responses.

You can also try this simple Sicilian Dragon setup.

You can basically play c5-Nc6-g6-Bg7 against most things and control the dark squares, except for the Alapin (2. c3) where you play either Nf6 or d5.

When black pushes the c-pawn in the Caro-Kann, it usually ends up like a French Advance but black is down a tempo. A more interesting opening for black is the Hyperaccelerated Dragon Sicilian or the Pirc, neither of which lower-rated players will have prepared for. There are great free courses on both at Chessable.