My brain can't compile shit

So I've studied every chapter well (enough) but I cant compile data...I'm in 12th rn and in akash so I've only given part tests till now and I score decent (enough) around 600..but I tend to forget stuff very easily as in i can remember superficial things but not the deeper things

So I've studied every chapter well (enough) but I cant compile data...I'm in 12th rn and in akash so I've only given part tests till now and I score decent (enough) around 600..but I tend to forget stuff very easily as in i can remember superficial things but not the deeper things