If the figures I've seen banded about on Facebook on pass rates are true, then it seems like the first group at the CAA doing exams really struggled. I can't give advice on the new syllabus as I am sitting under the old one. However, I think it might be a good idea not to sit for at least couple of months after the CAA starts running exams again to let the exams bed-in and to allow schools and the banks the time to have a better understanding of what is actually coming up in the exams.
On banks, from what I have seen a few of them definitely have 2020 syllabus sections. I have heard, though, (for both the UK and other EU CAAs) that they aren't accurate at all though in terms of what comes up. Banks shouldn't be used for memorisation though, they are a tool to help you study and check your progress just as past papers are for GCSEs and A-Levels in schools.