I have always been an advocate of having instructors (new and old) attend each others classes, at least one a month at a fitness facility. It helps new instructors see different cueing and choreography. It helps experienced instructors get new ideas and see things from the client’s perspective. And I recommend using a “buddy” system, pairing a new instructor with an experienced instructor to work along with for a while. The new instructor attends their buddy’s classes for a few weeks. And is taught about the sound system, the class schedule, prepping new music, etc. Both of these tools will also help you when you need to get subs into classes.