Hi,
Well, to get you started with Linux, I'd recommend trying some "Live CD"s out there, maybe from different distributions using different desktop environments (Gnome, KDE, XFCE,...) to see by yourself what you're more comfortable with. The point is that you don't touch anything on your system, and don't commit to anything just yet.
Once you're done, backup anything you want to backup, just in case (but you're already doing that, right? ;)), and install the Linux distribution you choose. Again, you may feel more comfortable installing it next to your Windows partition. Specially if you're a gamer, you may find that some games may not work, or not work so well, under Wine, and for those keeping a Windows partition could be an interesting fall back.
If there's a PlayOnLinux script for a game, there's a good chance it will work (it may depend on your hardware too, etc. however). If no script is available, the
AppDB ratings can give you some idea of how well a game works under Wine (and how much troubles/efforts may be necessary).
About other needs, there's a lot of softwares available, the best is again to experiment. Most of the time you'll probably be using softwares available from your distribution, check those first. For audio editing, maybe you already know Audacity, since it's available under Windows too. It's quite good imho.
It can also be interesting to join real life or virtual user groups to get some support and share experience from peers.
If you like experimenting, there's definitely a lot to do with Linux :) Good luck...
Edited by petch