woohoo and congrats!
oh and welcome :c )
There is a beginners section here at the forums that can be useful.
I would recommend the book 'Understanding Exposure"
Amazon.com: Understanding Exposure, 3rd Edition: How to Shoot Great Photographs with Any Camera (9780817439392): Bryan Peterson: Books
it will help explain when and how to actually use some of those buttons (well the really important ones) in order to take well exposed photographs.
I would also recommend shooting in RAW or RAW+JPG. RAW mode (DNG) is essentially a digital form of a photographic negative. You can fix your exposure and adjust colors and such really easily doing this with RAW files and a Post-Processing software.
Adobe Elements and/or Lightroom are recommended (by me) for processing. But there are a ton of different processing software. This is where the real work (imo) is done (lightroom is my work horse). Even if you get a proper exposure out of the camera, you can do so much with your photographs with the software.
The biggest thing you need to do, I think, is to use your camera. Don't be afraid to make mistakes.. you will make tons.. I've been shooting for a couple of years and I still make tons.. but you will learn over time. The book I mentioned will help get you up to speed a bit though.