There are so many factors it is hard to quantify. First you have to be in a market where Uber is well established. Then you have to not have too much competition in other carriers like Lyft or too many Uber drivers. Then your vehicle and the costs associated with it will determine really how much you make. Having an older, nice car, like a Nissan Maxima or Toyota that you have no payments on and are real road warriors is your best bet. Then you have to watch your market for a couple of months to see where the surge patterns are (every market has cycles and “hotspots”). Learning to work surges is your best money. Buy AAA or any roadside assistance insurance (sometimes available with purchase of new tires). It will help in a pinch, when there is no one else to help.
Then you have to be willing to commit 8–10 hours a day until you fine tune the demand. Deciding time of day you will work is next (for me 7–11am and 3-darkpm). Not driving around aimlessly while you wait for rides will save fuel. I work out of the half dozen Starbucks in my city. Good wifi, coffee, people to talk to, good place to read a book. Hanging out at airports or trying to make airport runs your core business is NOT good. Just because someone is getting off of a plane doesn’t mean they are going somewhere that is good for you. Developing a rolodex of regulars will make for steady income. My best advice is to get the proper insurance (get a ride share rider from your insurance company). You can work a whole year and it will be wiped out with one accident that you are not properly insured. Thank you for your upvote.