As Armondo said, challenge question to answer.

The book Oliver suggested might help.

And also, you might also be served to hire a coach. Someone who lives by providing information.

Be sure to choose someone with your same personality style or maybe pick an Introvert, as they tend to make more money because they come up with systems to sell without dealing with people.

Trick: When I start designing new courses, I search Udemy + print out course modules titles for related courses.

I do the same with Amazon, printing out related book Table of Contents.

Then I write an entire outline of the course first, so module titles. Then flesh out modules.

My guess is make your process less organic + more structured, so start with your entire course outline first.

Anything tangential (related + slightly off topic) goes into a file for spin off courses.