The easiest, surest way to make your clubhead accelerate into the ball is to shorten your backswing and lengthen your follow-through.
You must understand that the faster the clubhead is moving, the harder it is to control its location. If you practice just making good contact with a compact backswing and a long follow-through, you will develop power without trying to do so. What feels like a compact backswing will, over time, lengthen itself out, and produce more powerful shots, without your doing anything but trying to make good contact with the ball.
Just don't try to do anything but make good contact. As you learn to do this, you will become more confident, and what feels easy and compact will become easy and less compact, i.e. extended. And your shots will fly longer.