CBSE 10th

You can target the Top 50 b schools of India. Also, you can explore an MBA in Business Analytics from BITS Pilani, DTU, IIM, ISB, Symbiosis, LBSIM, Amrita University, Amrita University, LPU. Firstly, you decide the type of MBA you wish to pursue - sectoral ( like MBA in Business analytics or IT) or MBA ( general). Then make a list of top b schools for that MBA and entrance exam required in that b school. There are few specializations like MBA in business analytics, IT, etc. Which could be more relevant in your case.

You can choose to study-
1) PCB with Psychology as optional.
2) humanities with Psychology as optional ( if available)
PCB with Psychology would be a more wise choice specially in field of medical study and to be a psychiatrist. Best wishes.

No, you need to be atleast 21 years or more also must be atleast in final year of your graduation in 2022.