My topic is about how to become a healthy lifestyle
Hi @Kanchanadevi This page is full of information about teaching on Udemy.
Our minimum requirements for a course is that it contain at least 30 minutes of video content contained within at least 5 lectures.
Here are some great resources regarding course creation:
Course Quality Checklist
Udemy Insights Courses
Wistia Course Creation Compilation
Eliana Cerna
Udemy Community