Gdday everyone . I'm not a native speaker of English who happens to be communicating in English for decades on a daily basis. I have a four years Bachelors in English language and literature. Sat for IELTS back in 2010 and scored 7. Lived, studied and worked in Australia for years and currently have moved to France. Wondering if I could start my career as a English teacher , living in France where English isn't spoken much. Hence, the question of taking an online course, as face to face will be difficult at this stage of life. Should I take TESOL or CELTA? Please suggest websites which are recognised globally.

As a non native speaker, what pre-requisite courses must I take for both TESOL & CELTA?

Please help