Ask HN: What do i need to learn to build this?

I am a college student, taking the summer off. I know html / some css and plan on learning js over the summer.

As an alternative, I'd like to build a website to do the following, and wanted to know what should I learn to build it (I am a fast learner, I think). Should I go the ruby/rails way or the python/django way. The goal is to be able to start coding by mid may and get something usable by the beginning of july (before college starts).

The site would have a clean UI with just one comment box at the top, and below it would be previously entered text. Like twitter, but a little bigger text, and a bigger limit on the number of characters. It would not require any username/login (though I guess that would lead to more spam, and a whole bunch of issues). Also I am trying to build it for my campus, and was wondering what would be the fastest way to develop and deploy it so that I can get something out before the beginning of August ?

Thanks.