Requirements

Hi all! We are a couple of subject teachers (not married) , we are from Greece and we are considering teaching in UAE. First of all I would like to ask if there is any problem in residing in UAE (due to religion) that we are not married. Also , what kind of certificate should have a non native speaker teacher in order to take a job in UAE and what about experience? Finally , what about the new teaching certificate that is mandatory to earn a teacher in order to teach? COuld I take it online?

Thanks in advance!