help me guys

I'm taking/using uber for the first time. How does this shyt work? So I'm in the car with my sisters, but I don't think I actually paid for the uber. It just shows the amount of the ride ($40). So when do I 'confirm' the trip? Do I mention a tip when the ride is over?

So, I thought I was a virgin of course because I always preach that :francis: However, early this morning this girl came to my crib and said here's your son :martin: I said, "Yo, what the fukk? I don't got no kids I'm a virgin". Not the case :aicmon: She was like, "You forgot that summer...