How do you successfully execute an attack after applying a lot of pressure?

This game is one example of many games I've played where I launch an attack and apply so much pressure, forcing most of the opponents' pieces in a corner, but then I'm stuck wondering what to do. Everything's protected, any check I deliver either loses a piece or ruins the attack completely. I keep thinking for too long and make a random move so I don't run out of time, and the opponents breaks out and turns it around.

Unless I'm up material or a piece is pinned, both me and my opponent would be equal and there's no opportunity of overpowering a certain square/piece with more attackers than defenders.

In the example game above, I was using all my pieces to attack, and one of their rooks wasn't even participating, but they were holding up their position solidly. After analyzing that particular game, I realized that I could've used my h pawn to open up the g file where the queen was, but I usually get lost in these positions and miss the one winning move.

I'm kinda used to following general rules in specific openings and can calculate a few exchanges ahead and plan some simple attacks, but recognizing those hidden winning moves, when my brain is too focused on the big attack and the heavy pieces, are completely invisible to me.

You need to have the following: Lead in development. Space advantage. Open files. Center control. Piece coordination. Weaknesses in your opponents position.