I assume wow means "World of Warcraft". I do not know what "rf" means.
The first thing to do it decide what Linux distribution you would like to use. My feeling is that your requirements are something like this:
- Easy to install (this is your first time with a Linux install)
- Easy to install drivers for 3d graphics and audio
There are many distros to try - if you have a fast internet connection you might as well try installing a few and seeing which ones you like the best. Personally, I would recommend using Ubuntu because I think the installer is very easy to use and it is very easy to install 2d graphics drivers with the "restricted manager".
You can download Ubuntu from here: http://www.ubuntu.com/getubuntu/download
There are install guides on the net, or you can ask us questions and we would be happy to help.
If you have a slow internet connection, and can wait a few weeks, you can order free CDs to be delivered to you from here: https://shipit.ubuntu.com/login
I have never used World of Warcraft, so I will leave that to others with better experience of that area.
You can use pidgin
to connect to the AIM and MSN instant messenger networks. The same program will also enable you to use Yahoo, Jabber (including google chat), ICQ, Bonjour, Gadu Gadu, Groupwise, IRC, MySpace IM, QQ, Simple, SameTime and Zephyr. AFAIK you can only use text chat however, not voice or video. There are some alternatives - if you state your requirements more clearly we can point you at the bext program for your needs.