OK first things first, this
http://ubuntuforums.org/index.php link is to the Ubuntu forum. More help and advice than you can shake a very large stick at. Secondly, no matter where you live there will almost certainly be a Linux Users group ( a bit like AA meetings for geeks 😮 ) within a few miles who can and will help. I live in rural Herefordshire and there are two groups within 15 miles from me. You can download the iso of Ubuntu 8.04 Hardy Heron from here
http://www.ubuntu.com/ which has links to both desktop and server editions. If you don't have broadband you can even ask them to post you a copy completely free of charge (takes about 3 weeks).
Give it a try.
Point two. given you have sata and the price of memory now you could probably get two smallish (50Gb) drives from ebay or from an advertiser in Micromart magazine that won't break the bank then you can 'ghost' the drives to give belt and braces security.
I should say that I personaly have no experiance of running a server but the guys on the ubuntu forum will have for sure.
John
sleep is a caffeine deficiency.