I was basically looking for the same exact thing when I first came here, you know, trying to up my game, take it to the next level. I ended up just playing the people here and figuring out a few things myself.
They have ebooks here that absolutely elevate your game. You have to start learning each of your opponents tendancies, then be familiar with your playbook so you know what to call and when to call it.
Execution comes with practice. A lot of the skill in the game comes before the snap, on both sides of the ball. Reading the defense when youre on offense, and adjusting your defenders when you're not.
Anyway, I'll help you out the best I can. My PSN is EggzOverEazy420, but you're better off finding me on here before we get a session going.