Life beyond SICP

I read SICP, which I don't regret, but I haven't moved any further since then. For a year I've been I've been toying around with languages like LISP, doing Project Euler tasks. Now, when I hear that my friends will write a compiler, a basic OS or collaborate to create a simple game, I feel I'm behind. I don't think that they will need my linear-time fibonacci numbers. What do I do now, /prog/, what do I do after SICP?

I am the compiler of my IDE.
Lexer is my body, and parser is my blood.
I have run over a thousand passes.
Unaware of optimal output.
Nor aware of correctness.
Withstood pain to create many executables.
Waiting for one's arrival.
I have no regrets, this is the only path.
My whole life was "Unlimited Code Works."