Off to a great start.
I cannot find the site navigator icon on the website...
Clicked for around 25 minutes.
Perhaps add a link for the idiot guide?
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https://academy.appian.com/#/online-courses/81e23e63-8e28-497f-aafa-0d9bbf3d599c
Link to page containing instruction.
Can you post a screenshot of what you're seeing? Are you using a trial site or a different environment? Are you trying to find the end user view of sites or the designer view of the site?
Not allowing access to the document.
I found it. You have to create a My community edition site and access the course through there before the navigation menu appears.
Seems that you cannot backtrack once status is completed?