Everybody's different. Everybody has different experiences and different skills.
My first manual transmission experience was my Honda XR75. Fantastic little bike for a twelve-year-old, and I got in an awful lot of practice modulating the clutch and throttle. We lived in a very rugged area and I had no choice but to develop mechanical sympathy.
My first car was an MGB with overdrive. Lots of gears to play with. Lots of fun. After the B, I spent too many years as a delivery driver in RWD, stick-shift Corollas. Slick shifting cars with the little T50 transmission. I logged around 30,000 miles a year, most of it in town, and threw heel-toe downshifts by default, usually while wearing Vibram soled work boots.
For fun, I play trucking sims, loaded just as heavy as i can get, trying to float gears up and down and keep the thing moving. This is made more difficult by the lack of feel, but I'm pretty good at it. Good enough that I could probably pick it up in real life without undue drama.
So where's the imposter part? I'm not a great driver. Safe, yes, and skilled, but not great. I have never been on a proper track and would, without question, suck at racing. Don't have the reflexes, don't have the competitive spirit. Hell, I haven't even watched a race on TV in probably twenty years. It doesn't interest me. That part of me died when it became obvious that I'd never get anywhere close to any of my automotive dreams. And yet I'm hanging around a place called Grassroots Motorsports, pretending like I belong here. There's your imposter syndrome for you.
I'd say I have the "grassroots" part down pat, but given the number of genuinely wealthy people here, I'm not sure I've even reached that standard yet.
Have fun and build skills, man.