answer:I would be concerned if you didn’t have stage-fright. Just breathe through the first day and it will get easier. Everyone is nervous. During the years I was a teacher or in a teaching community, all the teachers (even the old pros) had jitters on the first day. You will get the hang of it very quickly. You are smart enough and will be fine. If there are some snags, remember that you are not alone and not as terrified as the 18-year-olds. Try to sleep. Chin up. PS. You are ahead of the game because you have had on-the-job experiences.