Hi James:
Well, you've really said it all, sort of. As you become comfortable with yourself as the facilitator and leader of your class, your students will pick up on that and tend to be more responsive to your leading. That doesn't mean you have to be autocratic or bossy, or militaristic. The more of "just you" you give your students, the more relaxed they will be to you and your personal style.
Regards, Barry