In the meantime, you really need to send your UK qualifications to be evaluated. I used World Education Services (WES) for this. I have a degree from a Scottish university and a PGDE also from a Scottish university. My BA is the equivalent of a US degree and my PGDE equates to one year of grad study - even though I have been teaching for 12 years. You will need to have sealed transcripts sent straight from your university to whichever organisation you choose to evalutate them. There is a list on the Florida State Department of Education website that will tell you which organisations are approved. WES is one of them.

I know you can’t do anything about teaching there right now but I arrived in Florida in July of 2018 (my wife is a US citizen), applied to the Florida Education Department for a teaching license in September 2018 and my application has still not been processed. Luckily, I was subbing in a school who wanted to hire me and they contacted them. I have been hired until the end of the teaching year, and advised that I need to pass the certification exams for my subject if I want to be hired again in August.

The good thing is though, if you do manage to get to Miami on a visa, you can sit the certifications any time you want. Once you pass the exam, you will receive a ‘statement of eligibility’ to teach in Florida and you can be hired by any public school while your application is in progress. Without having the certification, it will be virtually impossible to secure an interview. I got lucky because the school I was subbing in could not fill the position I now have so they hired me as a professional guest teacher before officially hiring me ($160 a day instead of the $75 for being an ordinary sub but without any benefits). I asked them why I never get invited to interview and they told me if an application doesn’t show a statement of eligibility, they can’t interview the applicant.

Best of luck.