One of the first things to check when trying for more distance is your grip. The best grip for maximum distance is a 'fingers' grip rather than a 'palms' or 'fisty' grip.
Many short hitters grab the club like a baseball bat, in the palms rather than in the fingers.
A 'fingers' grip allows the club to release through the impact zone. Contrast that with the swings of many amateurs. The most common tendency is to swing fast and rip at the ball. Use a 'fingers' grip to help release the club through impact. Keep a light grip for maximum distance.