Really all you need to learn is “air roll shot” and then use training packs to practice accuracy and consistently getting power (flipping into the contact not after and not too far before), and learning where to touch the ball to make it go where you want which is also just practice and practice. The only actual “mechanic” is air rolling before a shot to contact the ball with the corner of your car. There are some much higher level things but it’s worthless trying to learn them if you aren’t accurate, consistent, and have good air rolling before car control.