With no page limit and 500 MB of space, you'll likely have more than enough space to build your site, and it even provides HTTPS/SSL encryption, meaning your visitor's information will be kept safe. Plus, you're able to integrate your site seamlessly with social media accounts. If you do decide to use Jimdo, beware of one thing: the builder prevents free websites from being indexed by search engines.
Google Sites Pros and Cons of this Excellent FREE Website Builder
With more than 11 million sites built on IM Creator, it's a popular option for a few reasons: there's an easy point-and-click interface, an extensive range of templates and images, and unlimited web hosting and domain services. Plus, the platform is scalable, and you can have either single or multipage layouts. This builder is unique for its built-in ecommerce tools, and offers SEO and Google Analytics to fully optimize your site for search engines.
Join a few Facebook and/or LinkedIn Groups about your course topic or about a related topic that your target market is interested in. Pay attention to the questions that members are asking in these groups. If someone is publicly asking for feedback or help with a specific problem, you can bet that other people in your target market have that problem as well.