There are many videos in YouTube for users to learn about Oracle installation and Oracle VM installation.
http://www.youtube.com/watch?v=R_W5_5wJy80&feature=related
When users finish watching the video and feel like downloading Oracle Database 10g or 11g to evaluate the product and have a feel, the users can proceed to the following link: http://www.oracle.com/technology/database/index.html
For those who like to know more about Oracle VM, one can check out Virtualization Technology Center: http://www.oracle.com/technology/tech/virtualization/index.html
