As someone in the same boat, I chose PHP as my language of choice, and in a matter of about a year went from not having any real knowledge to landing an internship about a month ago. HTML and CSS are necessary, beyond that, I think any other technologies you pick up will only help your cause. Only piece of advice I have for you is don't slack off and don't get lazy. Think of a project that is far beyond what you can do right now and start creating it, for me, having a project of my own was the most motivational thing I could ask for. One more thing, if you don't type correctly, start learning now! 60wpm vs 25wpm can really affect how long it takes you to develop.