Checking for the Programming Gear

People on this board have talked about programming as a gear in your brain that, to a first approximation, you have or you don’t. I’m wondering if there’s some well put-together resource you can direct someone with zero experience and just a web-browser to and say “if you’re having fun an hour from now, you have the gear, good luck”—maybe something on Khan academy?

(I learned to program a long time ago, and I started with BASIC program listings in my math textbook—I don’t actually know what the optimal onramps are now.)