Hey!

If you want to go for MCA. Then you should learn programming.

For MCA you must be good in programing and coding. So, If you are not interested in the Computer application then you can leave it. Joining MBA would be a better choice than MCA. 
As there are large number of business schools so you should be very careful for during choosing your college. 
There are a large no. of MBA entrance examination for admission to various institutes.
eg CAT, XAT, MAT, SNAP,GMAT etc etc....

All the best!