Read full textbook with complete understanding besides mastering all the IAS/IFRS relevant to SBR syllabus. Then solve all the questions of at least one exam kit (BPP or Kaplan) but both are preferable. Also, try to solve at least 5 past exams under exam conditions with 3 mock exams before your Sep 2021 exam. Definitely, writing your own hand notes will aid you to remember everything far better. For more and daily study support and motivation you can connect with me via whatsapp.