I am happy to know you want to become a teacher. The first thing you need to do is improve your English writing skills (and maybe reading ones too?). Even small children learn in school how to print their names and simple words. They also are read to by their teachers. Teachers are role models and must be a good example for reading, writing, and communication.
I believe all state have a certification system (that varies from state to state), so please contact Oregon's state board of education to find out that state's requirements. Here is their Web site -- State Board of Education - Oregon Department of Education