Uber 101

Not pregnancy related. But I'm sure pregnant women have taken an uber before, right? I have never taken an uber. Can someone please explain the process to me? I'm a very shy person and I don't like talking. Is it rude to stay quiet and listen to music the whole ride? Do I sit in the front or the back seat? Do I tell the driver where I'm going and he/she looks it up on their phone? How do I pay? Do I tip? Any other tips/advice?