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I'm not ready to think about doing this to the real office yet -- so far I have just been using defaults and wizards -- I haven't the slightest idea what I am doing!

That's exactly what you're supposed to do!
http://amazingcharts.com/ub/ubbthreads.php/topics/41344

I think you've figured out how easy it is to setup. Just run a little connect wizard and you're on a domain network. DNS and Active Directory tend to just work if you're not tweaking stuff. SBS 2011 just works for me. I don't really do anything. Centralized Reporting and backups make life easy. Just an email report once a week to see how things are going.