Mandrake 9.1 is out, and I highly recommend you get it. I'm a linux expert (almost) but I find it nice even given its catering to newbies. As for your inquiry as to why companies charge for Linux if its free, that is a common question. You see, free software refers to freedom, not price. Anyone can still charge for free software, but you are given the freedom to give copies to your friends, resell the software yourself, and have access to the source code. Often Linux is worth buying in a boxed set since it usually comes with nice manuals and free tech support. I paid 80 dollars for red hat linux 7 (this was a long time ago and the price has gone way down) and it came with two manuals, extra cds with staroffice, and a subscription to the red hat network.
Anyway, if you have any trouble installing Linux, please let us know and we'll help you. Good luck!