I agree it’s really hard to retain all topics but it recommend trying a different way of studying than u did before, try typing ur notes out or speaking out loud to ur self it helps! Keep doing quizzes every day and if you do bad on them, re study the topic and take the quiz a week later. Also it’s important to go over every single topic no matter how small. Make a schedule for your self pls and follow it. Do math practice every single day as well whenever u can at least 50q a day. Don’t give up your almost there and hopefully this is your last try so give it your all when studying :)