If you like Ruby more, then check out Rails. If you liked Python more then check out Django and Pylons. Of course there are other languages/frameworks which are also excellent but these are languages with a lot of tutorials, and frameworks that have great communities and are industry proven.
Learn JavaScript, jQuery, REST and a back end language of your choice (Python, Ruby, JavaScript / Node.js) to implement your REST services in. These are the building blocks of a modern web application.
then
http://tryruby.org/
If you like Ruby more, then check out Rails. If you liked Python more then check out Django and Pylons. Of course there are other languages/frameworks which are also excellent but these are languages with a lot of tutorials, and frameworks that have great communities and are industry proven.