How to use the oven

Hello!!! My name is Jarina Chen. I am from Thailand. The thing that I want to learn is about 'how to use the oven'  The reason why I want to know how to use the oven, because I could bake the cookies for selling and eat for myself and family. And  the reason why that I want to sell it because if I sell these cookies, I will be rich!!! But the first thing that I need to do is....... I need to know how to use the oven, because the oven is hot!!! I mean very hot!!! After that, I could bake these for sale!!!