A waggle is not a random jumble of movements. A waggle consists of elements that you are actively bringing into your swing. If it is random, it's not helping.
Foot action lets you transfer ground for effectively through your body. Start to get a feel of this by keeping your feet flat and making swings with the club.
Once you can swing with your feet flat on the ground, start to let your feel roll in one after the other. This will give you a feel of sequencing as we build into your full swing.
Here is a review of methods and techniques you can try practicing in your short game.
