If you're playing against a patient player who knows how to block your shenanigans and doesn't let you jump in, you have to play footsies.
Walk forward and make it look like you're going to walk at them, see if they push a button. If they push a button that means you could have backed up a little and then whiff punished them, although that's way harder online.
If they don't push a button, you're free to walk up and do whatever you want.
That's the gist of how the game starts to evolve once you have two players who respect eachothers defense.
edit: You really have to fight that fear of "what if they push a button" because they're human just like you, they can't always push the button at the right time