With your qualifications OP, you could consider university lecturing. I've worked across various education sectors in the past and, outside of private education, universities are by far the best funded and generally students are well motivated and want to be there. In addition, whilst in the UK, you can avoid the spectre of Ofsted if you work in HE!
If living abroad, you might consider an Associate Lecturer role with the Open University or another university offering distance/online learning. I taught for two UK universities in this capacity and had colleagues outside the UK, including those permanently based in Greece, China and the USA, which was never an issue for the university. The OU can be a great place to gain experience and other universities offering this kind of learning really respect experience from there. You can register for vacancies in your subject specialisms here:
www5.open.ac.uk/employment/advert-staff-category/associate-lecturer
You will probably need to gain a qualification in teaching for post compulsory education, but this is shorter, more straightforward and less costly than a PGCE for compulsory education and you can often get a teaching role in the post compulsory sector whilst studying part time for a teaching qualification:
ctccourses.org/product/level-5-diploma-in-education-and-training-rqf/
Alternatively, if you want a more traditional lecturing role you could undertake the PGCHE:
www.falmouth.ac.uk/study/online/postgraduate/pgche
You might also consider doing a TEFL course, which would qualify you to teach English as a second language either in the UK or overseas:
www.tefl.org/courses/
Good luck with whatever you decide.