The Split Grip Drill is excellent to practice if you struggle with the Lever System. Working on this will help with distance and control.
Using alignment sticks to make a quadrant to set up will help you hit the ball straight and not aim to the right.
To loosen your hands and wrists, twirl or swing the club. This movement will help reduce tension.
Placing the club on your shoulder and swinging it back and forth to the other shoulder helps take the tension out of your swing.