Congrats Miranda. You only have one first class. And now you've got that under your belt. As time goes on, you will gain more confidence up there. It is NOT easy to get up there in front of a crowd and lead. Try not to talk too much. That's difficult to get used to (being silent) but it gives your riders a chance to "get into" their ride (and talking too much is a huge distraction).
You should be proud of yourself for taking a huge step! Great job! Do you have a weekly class now, of your own, or are you subbing for now? Either way it's a great, new beginning for you!
The Journey is the Reward.