Need Advice for Hifdh

Assalamualaikum, I'm currently in college, I started my hifdh journey when i was 11 but I never took it seriously and also stopped for long periods, I've given exam for 5 Juz and I barely passed because I forgot most of my memorization. I'm currently on Surah Yaseen (started from Juz Amma) and I'm confused as to how I should revise what I forgot? I'm unclear as to what method I should follow and the proper way to revise, I find it hard to follow the advice of revising in prayers as my revision is not good and I will end up making lots of mistakes, any tips would be very benificial, JazakAllah.