皆さん、こんにちは!(Hello Everyone!)
I hate to be the one to break this to you, but the great bulk of English "teaching" jobs have about as close a relation to genuine education as a bologna sandwich has to French cuisine. You pretend to teach English to people who are pretending to learn it.
There are serious educators doing serious educating, but your odds of falling into one of those positions by chance are nil. Get yourself a Master's degree and any appropriate certification in TESOL or the like if you're serious. Avoid like the plague any place that teaches "English conversation", unless the "pretending" appeals to you and you have no intention of making a career of it. It isn't a teaching career; it is a job flipping language burgers.