First. Joomlearn is NOT an LMS, it’s a test manager, with a link to an external piece of HTML to (optional) comments on the issue. There's no way of controlling the course pace or quantum advances.
Second. The help manual is not clearly visible and surprise!, the link is dead. So, no real support neither online nor inside.
Third. Joomlearn doesn't allow a preview of content. Once you get a real peek inside it, it's clear why not. The extension just manages the tests, not the course (if any), so it's impossible to show something not managed by the extension.
I could go on, and probably will do shortly, but right now I'm too frustrated for burning almost $100 in a useless extension.
Sorry, no real option for LMS on Joomla by now.