When lifting the car, DO NOT use a jack on the pinch welds. Instead, use the plate on the frame rails as shown.

When lifting with a jack and supporting with a jackstand:

Place the jack here

Place the jack stand here

I like to place towels or something else soft between the jack / stands and the car to protect the paint

Lift the car with the jack until you have the wheel a few inches off the ground. Then insert the jack stand and lower the car onto it.

The jack SHOULD NOT be supporting the weight of the car while you're working under it.