Don't feel bad, that happened to me when I rented a car for the first time in ages on a trip to Portland in 2017. The key fob had no key (!) and I kept trying to start the car with the dash push-button, but didn't realize that I had to step on the brake for that to work - DUH! And the was NO MANUAL in the glovebox, nothing to show me the basics on the car.
I started to get out (embarrassed, in shame,

such an old dinosaur!) to go find someone to help me start the thing, when I accidentally hit the right combination of brake+button and it started. I turned it on & off several times to be sure that's really what worked.
My daughters howled laughing when I told them about it on my return. "Mom, that's the first thing they show you in driver training now - foot on the brake before you can start!" In my day, you'd better be giving it a bit of gas if you wanted it to start...[yeah, we keep our vehicles forever, till they're not worth fixing].
And now I'm getting used to driving my daughter's all-electric Chevy Spark. Guess us old dogs have to learn SOME new tricks!