hello! do you know Lincoln MKZ hybrid 2014-2015y is it a good car for taxi or Uber? is it strong?

I would think it would do a good job around town. However keep it maintained and if any warning light comes on or if you hear a funny sound, get it checked IMMEDIATELY.

risking a lot

I wouldn't say it is strong. If you are hauling fat chicks around, you probably want a truck.

which one do you recommend, Lincoln MKZ or Lexus ES? thank you!

Yes, it is. You might even be able to qualify for Uber Black with that car if you have the credentials. Since most Uber driving is short trips, that makes hybrids ideal. Short, around-the-city-jaunts is where hybrids get their best gas mileage and run the cheapest. They even reverse the magnetic polarity on the wheels when you break so that you're not killing brake pads and are at the same time charging the batteries with the resistance as you stop, which vastly decreases your fuel costs and your maintenance costs.