So, I use the Vienna gambit often, yet I don’t know how to play it after pushing the pawn to attack the knight. Do I develop? Do I attack the kingside? I’m not sure
Don’t play the gambit if you don’t know the plans! I recommend going to watch Gotham chess’ videos on the Vienna. His courses would be even better, but they’re not free.
There are lots of aspects to chess that are hard to learn; openings are not one of them, there’s thousands of hours of free content out there. Good luck!