In order to start your preparation you should be aware of the complete exam pattern and syllabus of the exam.

Make sure you know the weightage of the each subject. It is important to choose the right study material for your preparation.

You can refer previous year papers to understand the exam pattern and level of the exam and practice mock test for your practice it will help you to analyse your preparation level and you will get to know your strength and weakness. 

Revision plays a good role to score good marks in your exam. If you want you can make your important notes which will help you at the time of revision.

All the Best!!