Hello tiki16. You'll find instructions for moving from WordPress.org here...
1. Register a WordPress.com account and blog at http://wordpress.com/signup/
2. In the old blog, go to Tools → Export and download the XML (WXR) file to your computer.
3. In the new blog (on WordPress.com), go to Tools → Import → WordPress and upload the file you downloaded in step 2. After you upload the file, you can choose the option to Download & import file attachments if you want to move your media files.
Let me know if you have any questions. Cheers!