Question/answer found on Quora:
Question:
"If I wanted to develop an operating system, where can I start?"
------------------------------
Reply:
Young Composer: "Herr Mozart, I am thinking of writing a symphony. How should I get started?"
Mozart: "A symphony is a very complex musical form and you are still young. Perhaps you should start with something simpler, like a concerto."
Young Composer: "But Herr Mozart, you were writing symphonies when you were 8 years old."
Mozart: "Yes, but I never asked anyone how."
@bengoli moral of the story: don't ask questions when you're 8 years old, just do whatever you were going to do.