Here I have gathered a lot of posts relating to things about starting to use linux. I hope you can find what you are looking for to start using linux, or at least give it a go.
Linux Mint - Making it home usable
Linux Mint would be the easiest choice. You can typically just use unetbootin to make a usb-memory bootable and install/test-drive it from there. Or you can burn it to a dvd if that does not work. Afterdownloading the iso of course. Then you do not really have to do anything unless you require to run some windows application.
Fedora 18 - How to
Fedora linux I think is the right choice if you really want free software and the choice yourself to install any properitary software. You will also since it is only made up by free and open source software have software that is newer, also because Fedora is kind of the "leading" distribution in terms of introducing new features while still keeping it stable. I like fedora best.
VirtualBox related posts
VirtualBox is an application that is free that makes it possible to run operating systems virtualized, so that you can test for example linux mint or fedora before installing it to your harddrive.
Sound and Video
General sound and video issues that are mostly easily solved.
Browsing in Fedora requires some fine-tuning before it can be as enjoyable as Windows.
Here is a description of how to install Flash in ubuntu, compare this to the Fedora way to further see what the differences between them are:
Install flash in ubuntu 11.04
You will probably want to use linux to something. If you want to develop android applications, have a look here for a tip:
Android development in Fedora