Posted by Just a quick tip that caught me out when creating my 21c database with the Database Creation Assistant. Once you have answered all of the prompts and the creation of the database begins in earnest, there is an unnerving moment where the entire process seems to stall.
In reality, it is just an unfortunate coincidence of the default window pane being just big enough to show you the heading item of “DB Creation” but not large enough to show you the underlying steps that are taking place as part of the creation phase.
Simply scroll down and touch and let your heart rate return to normal 
. You can see what I mean from the animated GIF below.
Learning is not a spectator sport 