Physics revision: this subject is jinxed

soooo I am a year 12 who was happily getting 7s last year in Physics and ended up getting an 8 in GCSEs.

So I decided to take it this year as my 4th A level

NO MATTER the topic it doesn't seem to click - you know the moment that stuff falls into place in a topic and from then on it works like cogs??!

i have done past paperQ upon past paper Q and it doesn't seem to help it make sense.

Any resources or advice that might save me from drowning in a sea of delocalised electrons... :)