If you're using your own car, it's a losing proposition, unless you never drive in between rides, which is impossible because you have to drive unpaid to pick up the rider. Vehicle costs $0.61/mile to operate, ridesharing platforms pay $0.83-$0.88 per mile. So do the math, if you're driving more than 1/3 mile unpaid for every paid mile, there's a loss. Don't forget paying the vig to the Rideshare network of 20-35%.
I'm not factoring in the time component of the fare, because for average rides it is immaterial. In Los Angeles, Lyft pays $9/hr for regular Lyft and $6.60/hr for Lyft Line. Only when there's a rider in the car. So if you wait 3 minutes after drop off for the next request (like if it's busy and you aren't in an alligator pit of drivers competing for requests. You can also end up waiting an hour between rides if you're really unlucky or get taken outside of the hip zones where riders are plentiful), then take 3-10 minutes to arrive at the pick up, then give a typical ride of 5-6 minutes, your time payments are less than $5/hr. Possibly less than $1/hr.
The only way to eek out a slight profit is to rent a vehicle under a partnership and hit your ride quota to get the rental cost bonused back to you. At that point, your expense is fuel, and if you hypermile the right vehicle, the cost is about $.10/mile. Then on top of that, you need to win the lotto several times daily and get the vaunted long ride with a $12-$20 fare or $80-$90 if you hit the jackpot and you'll then be doing better than working in fast food. But don't forget there are plenty of unpaid miles. Getting back to your hot spots to increase ride count/decrease idle time, returning from the sticks after the jackpot ride, and driving home from the other side of the region when you're too tired to drive any more.