Revision

I am currently doing quite badly in my subjects Psychology A LEVEL and media studies A LEVEL, I have my end of year 12 exams or otherwise known as 'HSE' according to some of my teachers. These exams start in a week or so and i know that i wont do great on them but i also would like to start putting in the work for revision now so in the future i can slowly improve my grade to hopefully a B or A. My main confusion is that I don't know what to do and my teachers don't give great advice which leaves me not performing well and not knowing how to perform better. Being completely honest i winged my gcses and got 6's and to this day i am a complete rookie at revision which is starting to daunt on me. If anyone can offer advice on what to do from now I would greatly appreciate that.

I am currently doing quite badly in my subjects Psychology A LEVEL and media studies A LEVEL, I have my end of year 12 exams or otherwise known as 'HSE' according to some of my teachers. These exams start in a week or so and i know that i wont do great on them but i also would like to start putting in the work for revision now so in the future i can slowly improve my grade to hopefully a B or A. My main confusion is that I don't know what to do and my teachers don't give great advice which leaves me not performing well and not knowing how to perform better. Being completely honest i winged my gcses and got 6's and to this day i am a complete rookie at revision which is starting to daunt on me. If anyone can offer advice on what to do from now I would greatly appreciate that.