The first essential things to get out of this hurdle the actual turning of the pelvis, which relies upon the arms. Once you are sure you are able to turn your pelvis, learn to lift your foot by turning your hip inward, and you will even notice soon after that you are able to use the foot on the ground to help you turn. This motion is necessary for every sports motion, and has an endless learning curve because you could eventually learn to kick a bag in the form of a roundhouse kick.
Kick Intro
The kick is the same as the roundhouse except a drop movement occurs before the turn.