For the majority of entry level jobs an online course is fine. It allows you to test the waters as it were and provides a good start to a career teaching English. Choose a course provider carefully and do a search for them online to make sure they provide what you’re after. Oh, and good online courses will always come with a tutor (some are completely automated and, in my opinion, not worth it at all).

I can recommend ICAL at http://icalweb.com.