If you are looking for a job in commercial schools, they will train you in the use of the materials they use; they are just looking for native speakers with a decent general education that they can mold to their requirements. I would suggest that you apply to one of those schools-- ECC, Nova, GEOS, etc-- and work for them for 6 months to a year until you get a handle on what you are up to. Then you can start teaching on your own.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.