CAT

It actually depends upon the individual's caliber but generally for CAT at least 6 months of preparation is required. You should at least try to start the preparation from July-August to get a decent score.

You need to refer to college website as they have different criteria for different caste. And you can even check with last year cut-off

After getting the score card, you can visit the website of the best colleges and match the criteria and apply accordingly. Thereafter, your interview marks and written exam marks are also important. If you want good college, then you need a combination of all these.
Good luck.

Its hard to get a call from SPJAIN unless you have 95-97%ile just to be on safer side. They look at your overall profile. Calls are mostly profile based. But still, never say never as SPJAIN is known for its unpredictable calls. All the best for future endeavors.
Your 12th marks are slightly on the lower side so to nullify that high percentile is required for sure.

I donot want to discourage you but with 80%ile its hard to get a call from SPJAIN. They look at your overall profile. Calls are mostly profile based. But still, never say never as SPJAIN is known for its unpredictable calls. All the best for future endeavors.

Try for Alliance university, Amity, IMT Navi Mumbai, IBS, Christ University, UPES, BIMTECH with 75 percentile.

Please refer to our institute website for applying