I am a native English speaker. I took an online course which was very good. (ITTT) I had no prior knowledge of the system of English before I took this course. I passed with a grade A. I have now completed my CELTA interview to do a course in Ukraine and I have been accepted. I have no teaching experience and did not have any experience of the English language before. So therefore, the answer which has been posted about you need to have teaching experience is rubbish. Just get some knowledge of the language and then apply for a course. Hope you do well and have as much luck as I did.

Richard.