Hi @Sohaib Amjad !
I am far from an SEO expert, but I will share my approach. The principle is to include some lectures and sections in the way people search on Udemy. For instance, in my area, people often search based on algorithms' names, and thus I try to include the names of algorithms in the lectures and sections. Of course, I also include these keywords in the Landing Page, both in the text and subtitles.
When people search for something, Udemy has a recommender algorithm that always puts on top what is most likely to sell. Hence, you need to put yourself in the perspective of the algorithm and ask yourself: what makes the course sell? Most of it comes from the number of ratings and average rating, so I would put an extra emphasis on that.
Good luck with the course launch! Make sure you get ratings as fast as possible and drive your course up the ranking!
