Find the oil pan, there is one bolt(drain plug) towards the back or on the side. The pan has a flat area where this bolt is. The oil pan is directly under the engine and attached to the engine block. When you're done draining the oil, replace the bolt and tighten it snuggly, do not over tighten it or you will ruin the oil pan. Don't forget to change the oil fiter as well.
When you are done with the change, run the motor and check for leaks by the drain plug. There probably won't be, but check anyway.
Sorry if I got too basic.