fix a car

I already know how to change a tire and replace break pads. I also can change oil, even though it is better in the long run to have someone else do it. I have also changed an air filter and windshield wipers. On my new car I don’t know where the car jack is though. I want to know a little bit more just so if something happens to my car I am not screwed by taking it in and not having a clue. I still don’t know some simple things like checking air pressure in my tires.