Restrict access to html content?

Hi,
I’d like to sell access to a learning platform, but most of the content will be in fact html, not the posts or pages themselves. On the home page (which can well be freely accessible) the users will click to enter the virtual learning space, which will be inter-connected html files. Can this plugin restrict access to such content too? And do I need to save this content under wp in my file manager, or it can also be above?

thanks!