Welcome to linux and welcome to the LQ forums!
There is a learning curve to using any linux distro. Linux is very different than Windows. You will have to do some reading to get the most out of any linux distro you choose.
Ubuntu is one of the more beginner friendly distros, and there are tons of tutorials all over the net for Ubuntu, so it is a good choice for a beginner.
Here are 2 excellent sites for getting started with Ubutnu:
has a lot of beginner friendly tutorials for Ubuntu and many other distros. Here are 2 recent good guides for Ubutnu:
To install Ubuntu 9.10:
And a post install setup guide: