I'm not in a big-city either, but have access to mid-size markets where Uber is not established.
I know someone who is an Uber driver. As a courtesy to his passengers, he keeps bottled water, and every conceivable device charger. Drives part time. Makes good money, especially when civic events are happening in his area. People will use Uber so as not to have to worry about, parking, traffic, etc. Your vehicle must not be older than 10 years and in good repair. Uber insurance is in effect when you have a fare, otherwise your insurance is in effect. Check out the website. Good luck.