Here are a some excelent video casts from U.C. Berkeley on Ruby and Ruby on Rails that should help you get started with such cool technology!

Ruby on Rails – Part 1: Hello World

Ruby on Rails – Part 2: Just Enough Ruby

Ruby on Rails – Part 3: Basic Rails

Ruby on Rails – Part 4: Advanced Active Record

Ruby on Rails – Part 5: AJAX and Testing

Ruby on Rails – Part 6: Configuration and Deploy