Welcome to MobileRead, padosobo!
Congratulations on your new Kindle. I am sure you will love it! I am already on my second reader and couldn't imagine life without it. If you have any questions about your reader or ereading, don't hesitate to ask. People here at MR are wonderfully helpful and friendly. We also have a dedicated Kindle forum
where you can search for answers that might pop up and as Alpha already told you, we have a huge number of free ebooks
that you can download in the correct format for your Kindle. Enjoy.