Ask YC: Advice on learning programming in 9 months

I am tempted to quit my job and move to the bay area to spend 9 months focused on learning programming and a bit of web design.

I already know a bit of programming, one college course of Java worth but not much.

I am an aspiring startup entrepreneur and want to get to the point where I can start creating cool stuff. I could probably get by depending on others to do the technical stuff, but I feel like in the long run learning programming is really important for my desired career path.

I know it takes longer to become a great hacker but I hope to learn as much as possible in 9 months.

What advice would you have for someone thinking of doing this?

I am thinking of starting with HTML/CSS and Javascript and working on some simple browser add-ons, so I can start creating stuff that applies what I am learning relatively quickly.

I wish something like Ars Digita University still existed today but it doesn't. I am thinking of joining something like the Hacker Dojo or something similar.