The weight of the clubhead cannot be manipulated. It MUST be swung. A swing is accomplished when the club goes back and forth with the rhythm of a pendulum. The "tick-tock" of a pendulum is the beat of a great golf swing. Many golfers struggle with rhythm because of the anxiety to hit the ball quickly and desire for distance.
Let me give you two key drills. The first is an oldie but a goodie. Count "one thousand one" on the backswing and "one thousand two" on the forward swing. By counting as you practice, you will see more consistency in your ball striking.
The second drill is called Full Swing-Half Effort. Make a full swing with a 7-iron or driver, but feel like you only use half effort coming forward. This will lead to a better change of directions and a feel of effortless clubhead speed.
Give these two drills a try and you will have the "rhythm".