your here = that is a start
Start at the tutorials..
I am sure some one will pop up with some whie papers for beginners for you to read
also it helps to have a couple of pc's to network to start playing
you question is rather broad .... What area of networking are you thinking..
are you thinking of just one OS or working with several?
"Consumer technology now exceeds the average persons ability to comprehend how to use it..give up hope of them being able to understand how it works." - Me http://www.cybercrypt.co.nr