Just a thought.
You could write a book about it as well, then, if you can't do a course. I strongly advise against Amazon's KDP, tho. Another option is Draft2Digital. Amazon, if you don't sell enough copies of the book, they basically will own your product and you lose every penny from selling on there. Draft2Digital lets you have it forever, it seems
As for Udemy, you could publish a book and then use Udemy for the course to cover it. I have seen tricks like that before on Udemy- where people also sell a book, certain content to complete the course, a link to their own website for an online academy, etc. Not exactly the best solution, perhaps, but it's an idea. You could then mention making a course on Udemy in a resume if you ever want to do it for a college later.
DaveTheCoder I also agree, that doesn't even sound right.