How can I learn to teach exercise to music?

listen listen and listen to your music …the better you know it the easier it is to teach….
find a mentor who will work with you patiently over and over…. and after you have done all you can do search your soul and decide if this is really your career path… it is not easy to please a group of diverse people… if you really cannot hear the music or find the beat you may want to consider another type of class that is not relying on choreo or beat driven style….. good luck