I would actually consider only Ruby and Python. Javascript in my opinion will take longer to get up and running because the language syntax and frameworks are

I would actually consider only Ruby and Python. Javascript in my opinion will take longer to get up and running because the language syntax and frameworks are not as straightforward to grasp for a complete beginner. Ruby and Python have awesome books for beginners and intermediate. I recommend Think Python by Allen Downey and Learn to Program by Chris Pine for beginners. Both are interesting, relatively small, and give you a taste of the language, and both are free. Both Ruby and Python have frameworks (Rails and Django) that are used by many, many people making it easy to ask around if you have any questions.