MBA Entrance Exam

You can start preparing for CAT. You can start with the basics of maths of 9-10th. Start practicing on Reading Comprehension and Verbal. Look at the previous year's questions. Get a feel of CAT pattern and decide which is your weak and strong portion. Prepare a schedule accordingly.

You may refer to following link for tips on CAT exam preparations: https://www.shiksha.com/mba/exams/cat

Most of the colleges have eliminated the GD process and replaced it with WAT(Written Ability Test) which is more of a test of your thought formation and english writing skill and not just about having the highest voice in a fish-market. But PI still remains the most integral part of the process. Hence if you feel that you are not confident enough in English, I would suggest you work hard towards it and if required join a coaching center for the same and overcome your hurdle.

You can aim at scoring 99%ile or more for a call from IIM A. But getting into IIM A will depend on your interview performance along with acads hence cant be ascertained precisely.

Dear Sourav,
not only requires one to be good in maths but also good in reasoning and current affairs. So as you say that you are not good in mathematics, I would advise you not to for CAT. However, if your accounts and taxation are good, you could definitely go for CA course. even CS if you like. It is just a rumor that CA and CS are hard. They are not hard, just a bit lengthy.

Yes, you are eligible.

Yes through management quota.

Hello Manish,
I would suggest you to go for CAT since it is accepted by most of the colleges. Then depending upon the state you want to take admission in, you may enroll for one like MH-CET!
Good luck!