On which platform should I publish a marketing training video course for small businesses that I want to also push on my own landing page?

Alternatively, I could use both my own website/landing page and then push them to a Kajabi, Udemy, or Skillshare. Also, how should I package my online video course? What is the sweet spot for pricing these days? What is a good number of modules to have, and what are the dangers, pitfalls of online courses? The course is a marketing training product for small businesses. Thanks much.