The best place to start would be at a bookstore that carries Microsoft publications.  Yea, I know it's boring reading, but some of the books include trail version of the software, and the software is also available for download from Microsoft.

I haven't seen a "dummies" book on servers but that doesn't mean there isn't one.  If this is a hobby, that will probably suffice as a knowledge base along with any forum related to the subject.  I would also recommend investigating a local community college as a knowledge base for furthering your education on the subject if you choose.