What i already know about my topic?

I already know some about cars from what I have seen and the questions I asked whenever I seen my father or someone I knew working on cars. I remember learning how to change the brakes on the car and help my dad change the oil. The only thing I don't remember my dad teaching me about cars was the motor and were to put antifreeze at in the car. As I grew older I began wanting to learn more about cars. So I took it upon myself to start studying on cars and learning more about them myself. I learned about the peice that is used to connect and hold the tires together. I know a lot about cars but there are some things I haven't learned about them, such as getting the transmission changed and what is the best thing to do if u have blown head gaskets.