Thank you
I didn't do it at GCSE either, so that's not really a disadvantage!
Lots of content is just part of what you sign up for with A Level Psychology, giving up just means you'll fail and there's no point in doing it at all - think about it that way.
Use your teacher, they're there to help you so if you're stuck on something or you need help with a question, ask them!!! It will benefit you so much (if they're a good teacher at least, but try anyway). That brings me to my next point, do loads of past paper questions - do they get tedious? Yes. Are they likely to be similar to the questions in the actual exams? Yes. Will they make you draw upon your knowledge, and thus realise what you need to prioritise in revision? Yes.
They are absolutely worth your time -
especially research methods. ALSO, don't ignore research methods, the section is boring and dull but research methods is also around 30% of your overall grade and is very, very easy. Also, constantly consolidate your knowledge, don't leave a whole topic alone for 5 months and then have to cram it two weeks before your exams.
Come back if you need help, and I can also help mark 12 markers.