A little tip to help you memorize the sequence is to practice it yourself first (always) and then visualize it. Go through it in your head three times and then you'll know. Below are five main mistakes, that is, reasons for celebration that I made during my first decade as a yoga teacher and from which, in the end, I learned a lot. I quickly moved on to several teacher trainings and ten years later, I still love teaching yoga (although now I do it without the purple boombox).
If you want to increase your self-confidence, you could consider meeting with another yoga teacher to teach one-on-one. One of the most daunting parts of being a new yoga teacher is figuring out how to memorize the sequence you want to teach and transmit it seamlessly during class. Before the ink on my teacher education certificate dried, I sent my resume to almost every yoga studio, gym, spa, and community center in the city.