Is it possible to watch some videos, ask teachers/classmates and work on it eventually? You've only started year 12, it's natural to feel daunted by some A level content. Everyone is, but eventually it'll work out if you're working hard and smart.
The more important question is, do you need physics A Level for your future plan? When I did year 12 chemistry at first I reckoned half of my class would've dropped it if they aren't striving for STEM courses at uni, but we stuck with it and eventually it worked out for all of us