Hey there, I did Hacker School this past summer. I was one of the most beginner-level programmers in the beginning. I never opened my terminal, never heard of functional programming, and didn't even know how html and css worked. I was a noob. The only things I could do were solve project euler math problems, which was enough to know I loved programming and wanted to commit to improving. Despite my initial skill level, I found a full-time job shortly afterward as a developer.

TLDR: if you can code fizzbuzz and know you love programming, you're good enough to apply. :)