Your body has a current level of physical ability. Hitting the ball further takes an increase in clubhead speed. Period. So hitting more balls or taking more lessons won’t improve this.
The only thing that can improve clubhead speed is strengthening your core rotational strength and flexibility. Your core is the engine to your swing. The golf swing a turn back and a turn through. There are many simple, yet effective core rotational exercises you can do in your home, or even office to greatly improve your clubhead speed and driving distance.
With a fixed head position, rotate to the right and left slowly. As you feel a loosening of the core, start to rotate faster and faster. I hope I didn’t disappoint you with this golf driver tip.