Feeling incredibly dense, here
 

I'm going through the Quickstart Manual, and I can't get past square #1.

Create a new realm calling it "Tutorial" or somesuch, and tick the "Include Tutorial Content" checkbox, then click "Create New Realm".

Except I have no "Include Tutorial Content" checkbox...am I missing something incredibly obvious, here??

Tutorial Content is deactivated since the last update, iirc.

I was wondering why that is, too ;-)

It's not too hard to just set up an experimental realm and produce some content just to play around with and get a feeling for how it works. I started with my actual realm right away, of course I have to go back sometimes and change something or restructure, but learning it on the fly absolutely possible.

Thanks for the clarification, pplz. :)
I'll just start fiddling around in a sandbox, I think.