Where can I find out more?

You can learn a lot about Linux right here on the Linux Directory! Find a book that matches your interest and distribution. Buy it and read it!
The best place to ask direct questions about Linux and get a sensible answer quick is the Usenet news groups. There are several news groups under the comp.os.linux branch.

Since you are not the first Linux newbie out there you should try searching the Usenet news groups to see if anyone has already asked the same question that you want to ask. Use groups.google.com to search for the information you want. The provide a searchable archive of previous postings to the Usenet.