Hello, pamur, and welcome to MobileRead.
What you can do with your K2 first and foremost is read books.
You can download free ones from here, (see our ebook tab), or other sites such as
www.feedbooks.com
www.manybook.net
and many others.
You can download books almost instantly from Amazon thru your wireless, provided you are in the US. You can also download books to your laptop and then upload to the Kindle via the USB cord provided.
It has a built in dictionary, a very useful feature.
Don't hesitate to ask questions.