Andaae, as a fellow Newbie, my advice to you is pretty much forget anything to do with windows when it comes to playing with Linux.
yes the fundamental concepts are the same and KDE like the windows shell does a pretty good job of hiding the grotty innards from you while you find your feet.
First off I would have a trawl through sites like this one if you have a specific questions about doing something with Linux, otherwise, pretend its your first computer and you know nothing (which in my case on linux was not far from the truth
) and have a play.
has been a godsend for me on my travels during the past weeks. There are bags of "introduction to linux" pages out there that will at least cover the basic concepts. And for those "stupid questions" you could lot a lot worse than ask here, this has to be the most "flame free" forum I've ever been on.