if you are interested I can send you a download link to some very solid ESL teacher training material that you could use for independent study, if you are interested.

You will need to try things out in practice, though.

The material is partly authored by myself but the main textbooks are from other authors. It was used successfully before in ESL teacher training programs and is at Master level. I cannot grade your work, though, as the program is no longer officially offered after I dropped out of teaching for reasons of age.