Hey ThePz. Welcome to the Linux World then.
.
Ubuntu is one of the greatest Linux distributions (you can call them "flavors") for beginners.
Personally I would recommend you to get
Linux Mint instead. Linux Mint is heavily based on Ubuntu, but has some tools and more software available from the repositories. Plus the menu is - at least in my opinion - better than the one on Ubuntu. Its basically Ubuntu with some tweaking and ready to use as soon as you install it.
Should you need help for Linux Mint, you can use the info available on the internet for Ubuntu, as it will apply exactly the same for Linux Mint. Same for software installations. You act as if your system is Ubuntu, so you get the best of both worlds
Download the Live DVD version because its ready out of the box with flash, java, unrar, and many other features that you don't get pre-installed with Ubuntu. ;)
This is how my current Linux Mint 9 desktop looks like:
If you don't like Ubuntu nor Linux Mint, you can try Fedora or openSUSE.