I Have also installed Ubuntu7.10 on My Laptop...
And Learning how to manage it...
I have Learned most about the system of Linux... Like it detects devices and make file as /dev/sbd .or s
I have also connected my pc to Internet using terminal with GPRS...
I recomend to Use any Derivative of Linux, Almost all are same, But Command for Terminal have some difference
eg: in Ubuntu we Use "Sudo apt-get install ---" to Install anyting and In Fedora Core 6 we Use "Yum install ---"

If You want to get CD's of UBUNTU use this link http://shipit.ubuntu.com