Seminar troubles

So a few months ago, Armando came by our classes, to teach a pastor who wants to launch a Sunday school ministry at his own church, so they came by my former class and Armando urged me to give the man a preview on how I teach my own children. Well I demonstrated them a few storytelling techniques and they were pleased and wanted to learn further. I was glad that I could be of help for this pastors future ministry. Then Armando realized that I could also teach the other teachers at our church creative and age appropriate methods for teaching children. My instant reaction, was, well , me?? I have no formal education in teaching, I am much younger then all the other teachers and to be honest Ive never ever spoken  before adults before. I am somewhat intimidated by the task. But everyone of course believes I possess the skills and creativity to do it. I also need to constantly remind myself, that God will not leave me alone to carry out this task. He has already enabled me to teach. I cant forget my earlier days as a sunday school teacher, I had such a willingness, but I had no idea where to begin, my lips trembled and I had such an overwhelming sense of fear.As I fervently prayed and asked for God's help, I began to grow in confidence. I thank God , because I know I have come a long way and I know that he will continue to do so. So I must take upon the challenge and simply do it! And I am , I am compiling ideas and all sorts of things Ive done and stuff Ive gathered from my books and the internet. I have made very little progress, I need to start working harder, the date is drawing near, and I am feeling more anxious. I have a three weeks to be exact, which I hope is enough time. God please help! I want to do the best of my ability. If you've given me this task , then I believe you will also help me and enable me to complete it.