Hey Lucky,

Hope you are doing well!

Its good you want to preapare for IMU Exam,According to me you should take  the following steps:

1)Take out the syallabus/Be clear with the syallabus:

Knowing what to study and what not to study is very important dear,that helps you in taking the right steps and walking in the right direction towards your goals.

2)Decide whether you will be joing any coaching or will be doing self-study:

You should know what suits you to the best,and according to the resources available to you,choose wisely.

3)Manage time properly:

Keep time all for the topics,be wise enough to identify the topics that need more attention,yes you can call them your weak points.

And no matter how good you are in a subject never stop studying it,thinking that you will be completing it in the last moment.

4)Completion of the syallabus before time and Revision:

The earlier you complete the syallabus the more can you revise,and Repetition as someone has very well said is the mother of excellence.

Keep Revising as much as you can once the syallabus is completed.

5)Test Series+Mock Tests:

Once the revision gets over the last and the most important step is to join as many test series as you can and keep practsing and revising.

Hope so this is helpful!

Any more queries you may ask :)

All the best!

Go!You can do it!

Keep Smiling :)