Hello Aspirant

It's really good to know that you are looking for MBA domain.

It's one of the best domain available in Indian corporate sector.

If I look at your profile then it's really good, as you are a qualified CA and having 3 years of experience too, it'll add a lot of value to your profile in interviews for top B-Schools.

But for getting calls for interview from top B-Schools like IIM A,B,C or FMS or any other top 10 colleges,you need atleast 99 percentile in CAT.

As you are From non engeneering background, it'll help you in getting calls from top B-Schools, try to score above 99 percentile and it'll assure you a IIM call.

If I talk about prepration then yes, if you are confident and serious enough for cat then you can left your job and prepare for CAT but remember one thing persons having experience more than 3 years are having negative impact while getting calls so try to clear cat this time itself.

Hope this information is helpful for you.

All the best