Durring "Connecting the Pieces" in living world season 1, Ellen Kiel says she'll "clear you to enter the mists portal" this seems to suggest that this is the commander's first time visiting the mists canonically.
However, mist warriors attempt to recruit anyone and everyone they can grab the ear of - which implies anyone can visit the mists at any time.
Furthermore, Skimming through the wiki there's a lot of information about the mists only known by a handful of people and very little known by everyone, but deciphering how much is actually known and by who is a pain.
How is it that common knowledge of the mists is even more obscure than it's secrets?
But here's my more serious question: at the start of the game and over certain plot milestones how much would information would be available to the commander, assuming they put in the research?