What should I learn first?

HTML and CSS first. They are the foundational building blocks of every website. Once you understand the basics of those two, you can go own to start learning the other languages.

First off, to get started, I'd suggest the general Introduction to Programming course: http://teamtreehouse.com/library/introduction-to-programming

That will give you a valuable introduction and you can get started while you're thinking about what you'd like to dive into. I think it's worked into a few of the different tracks too.

For picking a track, what do you think you might really enjoy? Do you think you'd like make good-looking web pages right away? Front End Web Development would be a good start: http://teamtreehouse.com/tracks/front-end-web-development

If you get into the Intro to Programming course and find you really like the logic and solving problems, then you might look at one of the language tracks. Python is a favorite of mine for being clean to read and nice and simple to start with. Other people will have their own favorites too. Enthusiasm is a great learning multiplier, so poke around and see which courses look like things you'd have fun doing.

I find doing it all gives you a better understanding of the big picture. I like to switch up everyday.

What do you want to do? Websites? Apps/games for mobile devices? Or maybe you don't know yet and figure that stuff out along the way?

Oh and welcome! The content here is awesome so you won't be disappointed no matter what you choose!