An MA can be useful for teaching in universities and suchlike, but they will also be looking for experience. I would look into getting a decent basic training course like the CELTA first, which will cost a fraction of the price of an MA and will open most doors for getting going. Because many MAs are heavily theoretical, many places will also be looking for practical training as well. Online training is the method that opens the fewest doors because it doesn't involve teaching practice. I would recommend the CELTA first because of its international acceptance, followed by similar courses that have teaching practice. I would do the MA after teaching for a while.
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