Or, you may download the file.
Getting started with Rails isn't exactly a matter of programming, though that will be important over time. It's more a matter of learning how to move from the command line to the many files Rails creates, and then between the browser and the editor as you make changes and see results.
Once you have Rails installed, it's time to take it for a short and easy ride. This screencast walks you through the first few examples from Chapter 2 of Learning Rails, showing you how to create a controller and view and start putting content there.
For more screencasts and information about Rails and Learning Rails, see Excursions on Rails.