I am new to programming and have now learned lots of HTML, CSS and Javascript I'd like to practice with. I have even put some test pages together in TextWrangler, but I cannot work out a way to publish them for free so that I can practice. I am working on a 2010 mac. 

I have looked at various youtube videos, but so far have not been able to work out how to get from a text file on my computer to at the very least a preview of the page. I would really appreciate advice on a good free publishing method.

Many thanks,
Rachael