You need the ride share app, either Lyft or Uber. You set up an account on the app and link a credit card.
When you need a ride, you open the app. It will know where you are. You type in your destination, and the app will give you an estimate of the cost for the ride, depending on time of day, size of car, and how many drivers are available at the time. You pick an option, and the app connects you with a driver who will pick you up and take you to your destination. You pay and tip through the app. Easy peasy.