Best ways get up to speed on the structure of an existing Quickbase business app?

There is also a new add on from Juiced Technologies to help document apps.  The demo is here.   I don't understand the tool myself yet, but somewhere lost in my email is an invitation to a live demo with participation for that tool (which will get recorded and posted)  As you are new to Quickbase, you may not know about Juiced. The two Juiced brothers (Keith and Todd Jusas) are seasoned IT guys who have specialized in add ons for Quickbase for the past 20+ years. 

The recordings are here . I don't see that one posted for that tool so maybe the webinar is upcoming.  You can contact Juiced or else they seems to have bots to watch for Forum postings mentioning their name, so Keith may chime in here.