Look at quality online course providers like ICAL for your TESL training.

>>>>>What do you think is a good place to start at?

It’s a bit difficult to answer your question without knowing much about you and what you could offer a potential employer. A lot of schools want their teachers to have a degree, possibly a TESL Certificate and only hire native speakers however non native English speakers can get hired as assistant teachers, especially in English courses for young children.

I found a interesting article on Filipinos who work as English teachers in Thailand it’s at http://www.siampinoy.com/teaching-in-thailand/the-filipino-issue.html

It might help you get an idea of the issues you may face in some Asian countries.