Wasalam!

Let me preface this by saying Dont "leave" your job for CSS. Prepare for it in your down time. Job market these days is a hell.

The only purpose of the academy is to guide you about the basics. The right academy can put on the right track. YOU have to do all the work from then on. Any academy that claims to offer you more than the basics, is just a money making scheme.

My advice would be to join a reputed academy for the basics, then prepare on your own. Getting a reputed English Essay/Precis teacher on the side for personalized practice tests and checking would put you miles ahead of other candidates.

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Humein kya. Tumhein kya. Ap ko kya.