I wouldn't quit my job, I'm just working as an intern currently and I learn on my job as well, but I was looking to learn more and different topics outside of my job. It's a limited term internship and I'll be going back to school next September. I only started learning to program in University, and I'm pretty happy I was able to get a job considering I started knowing nothing a few years ago. However, now that I've come this far I'm not really satisfied with my current level of knowledge and I don't think I will be unless I push myself to learn more outside of work and school.

Thanks for the reply, it's good to hear from people who have worked hard to teach themselves.