The following adjustments to your address position should be relatively easy to make, and will quickly improve the quality of the strike, the trajectory of your drives and of course, your distance:

Tee the ball a little higher than normal, and play it forward in your stance, opposite the instep of your left foot. Widen your stance slightly, and settle at least 60% of your weight on your right side. Your head and your hands should be placed slightly behind the ball. Maintain a light grip pressure, relax your body and don't ground the clubhead - hover it slightly above the turf.

Combined, these adjustments will make it a lot easier for you to make a full and free shoulder turn, create a wide arc and get your body fully turned behind the ball at the top of your swing. You should be aware of an increase in the amount of coil that you create which will then enable you to move back to the left side and accelerate the club through impact with a more powerful ascending, sweeping motion. Keep your head back (hit up the back of the ball) and attempt to sweep the ball away without removing the tee-peg. Work on this procedure on the practice range. Pretty soon you may well be playing a game with which you are not familiar