RE: Be Prepared!
Hi, Ann in Germany! My suggestion is, use your nervous energy this weekend to thoroughly prepare and plan your classes, including flowing choreography AND cueing, so that neither you nor your participants will be lost. Say the moves and cueing out loud a few times to get your mouth around it - it's amazing how much we think we're communicating when actually we're not! Leaving as little to chance as possible about the actual structure of your class (especially Taebo, very fast and dynamic) increases your confidence - as you teach more classes, you'll be able to leave a little bit of planning behind and go with the moment.
Aerobics / group fitness instruction is a lot like s-e-x - the first time is usually the worst, so just do your best and keep at it!
Annette