Beginner golfers often have a tough time with many aspects of the swing. That includes the finish. What position should your hands be in? What direction should you be facing? Do you move your feet? The issue gets even more complicated for left-handers, who regularly play on courses that have a slight bias against them and have to contend with instructions that are written from a right-hander's perspective.
Keep your head down after you have made impact with the ball. The tendency of most golfers is to look up as soon as they have made contact with the ball. That's not going to work out most of the time. Picking up your head likely will cause you to stop your swing, and that will impact your distance.
Rotate fully to the right as you make impact with the ball. Your right hip needs to lead your swing to get your body behind the ball. Your hip gets through the hitting zone and your hands follow. After you have made contact with the ball, keep rotating your hips until you stop naturally.
Lead with your right hand as you make impact with the ball. But you have to finish with your left hand. Let the power from your left hand and left side continue to drive the club after impact. Keep finishing with the club until it has reached the level of your right shoulder.
Finish your swing on the balls of your feet. After you have made contact, your right hip comes all the way through the ball and your hands follow. You are not going to move your feet, but you are going to twist while standing on the balls of your feet. Your feet start perpendicular to the target, but by the time you finish your swing, your feet are at about a 45-degree angle.
Go to the driving range and practice your swing while you concentrate on your finish. Because there are more holes on most golf courses that dogleg left to right than right to left, you need to learn how to hit a draw shot. A draw bends left to right for a left-handed golfer and can be accomplished by finishing fully after turning your top hand a few degrees to the right at the setup.
Tips & Warnings
Slow down your swing. A good finish does not mean a fast finish. The slower your swing the more productive it is likely to be.