Your academics appear to be quite good. To achieve your goal, you must now concentrate on getting an excellent CAT percentile. If you are in a general category, you should aim for 99.9+.
Begin by strengthening your fundamentals, such as reading comprehension, and devote time to strengthening your verbal skills. Devote 3-4 hours per day, without fail, to your preparations and take note of important shortcuts, tips, and tricks. Also, ensure that you are up to date on current events and that you are well-versed in GK. Finally, work on improving your self-confidence and communication skills so that you can easily pass the interview at IIM A.