Hello there. Hope you are doing good. I would like to tell you that the purpose of taking coaching is when you need proper guidance under a mentor. You will be directed into the right path for preparation of your exam. There is no such coaching which can guarantee your good marks or score. At the end, what matters is how much efforts you are putting in your preparation. Indeed the coaching will help you in solving your doubts. Mock tests will be taken which will be evaluated too so as to know your performance.

If you feel that you can do preparation topic wise on your own, then you can prepare yourself also. Self belief is the ultimate key in the preparation of any exam.

I hope you found this answer helpful. Good luck for your future.