I published my first course a while back. While some people have used a free coupon that I posted on my website, nobody from Udemy has bought my course. I have improved my trailer, description and keywords but for some reason it’s just not selling.
Most likely, it's because your course is within a highly competitive category with 63 pages of leadership courses in the Udemy marketplace. While the demand is high, so is competition.
With a new course and 13 enrolled students, it'll take time and active marketing on your part to help it gain traction. I'd encourage you to read the "Best Instructor Posts of All Time — Marketing" thread in the Marketing sub-forum for guidance on marketing your course.
How about you make it more interesting by using AI to solve some leadership problems and also offer how you would solve the same problem without AI? Ai is the future even if we like it or not and until robots will replace human force people that learn ai will replace humans that have no idea how to use it.
I think AI added to your course can create that niche that you are looking for.