How should I prepare for my first lecture at a Korean academy?

I'm about to start my first lecture in Korea, and I'm feeling nervous. I have lived in Korea for a few years in the past, so adapting shouldn't be a problem, but starting this month, I will be teaching kindergarten and elementary school students at an academy in Gangnam. The academy has said they will give me a week of internship before I start teaching independently, but I'm still anxious. I especially want to make a good first impression on the kids and my colleagues, but I have a lot of anxiety about speaking in public. Ironically, teaching is exactly that kind of situation. Do you have any advice for the first week or information that would have been good to know in advance? I would really appreciate any materials or topics to study that could help with my lecture preparation, as well as ways to prepare before arriving in Korea. 🙏🏻