One of the things I learned, with any application, was to go thru all the menus. I know I won’t understand how to use everything and I’m far from a KM pro, but the discovery helps. With that being said, @peternlewis and @JMichaelTX do a phenomenal job of placing valuable information in the wiki.
Honestly, I believe this is one of the most important things to start doing to move from being a computer novice to at least an intermediate. Just run your mouse over the menus, check out the preferences, that sort of thing. Often when a novice asks for help from an “expert” the first thing said expert will do is start looking through the menus for a solution - they don't know any more than the novice, they just know where to start looking.