Hi @Yunita013 , welcome to the community! What are you planning on teaching about?
The best place to start is in the Teaching Center. In addition, here are some great resources regarding course creation:
Course Quality Checklist
How to Become an Instructor: FAQ
Wistia Course Creation Compilation
Ooops, it looks like you’re not a registered Udemy instructor. Want to become an instructor? We’d love to have you!
Become an instructor Already an instructor? Sign in
You can join the Instructor Club after you publish your first course. In the meantime, you’ll find plenty of help and advice in Studio U.