some overprivilaged asshole kid with rich parents who have too much money so they spend in on the kid and happen to find something he's really good at. I could have been the next ayrton senna if my parents had money and could afford to let me race.
I remember my dad took us to a go kart race once. he even took us into the shop to look around at the karts for sale... too bad he wasn't rich and didnt have all the time in the world to buy me a kart and take me to events.
Vettel wasn't rich... and neither was Lewis Hamilton. What they had were parents dedicated to their careers and a very, very early start in Karts. Anthony Hamilton, when he realized how talented his son was, worked extra hours to support him in karting, then eventually quit his job to become a full-time manager when sponsors started to notice Lewis. Uber-rich, they were not.
So... parental support, early start... and a whole crapload of talent.
You can start now, but you're never going to hit the top echelons without years of experience or gobs of God-like car handling talent. Go through racing school or attend autocross to pick up tips. Then spend some money to start competing in SCCA events... if you do well enough, you may get noticed. Or maybe not.
Consider yourself lucky. You live in the US where a middle-class person with an average salary can afford a relatively high-powered sports sedan like an MS6 and can afford to actually buy a Go-Kart and go racing. And the opportunities are all around you.
I'm what some people would consider
upper-middleclass-rich here, and yet I get to see the track only two or three times a year. A set of brand-new performance tires (not r-comps, just performance tires) is about equal to my entire monthly salary, and just running one official race here will set me back maybe three or four times as much, just in rental and parts. I get the chance to hit the track without being put out of pocket because of connections or media events... but not quite as often as I'd like. And even if I did make it "pro" here (I'm reasonably quick... easily matching more experienced karters and usually at or near the top of timing sheets at amateur track events), I wouldn't have many places to go. There are no regional events quite as well supported as in the US or Europe. Maybe once in a while, a driver here gets to the Asian F3, but that's it.