I would recommend you to go for Cognitive Science. Cognitive science is such a field that it involves Psychology, Neuroscience, ML & Neural Networks which can be realized in the fields of Artificial Intelligence. So this course will be a great opportunity for your target as well as your experience in MBBS will not all go waste.

You can go for MS program in Cognitive Science offered by:

1. IIT Gandhinagar

2. IIT Kanpur

3. IIT Delhi

Also there are other institutes as well. There is a entrance exam named as  COGJET which enables a candidate to seek admission to PG programs in Cognitive Science at IIT Kanpur, IIT Delhi, CBCS Allahabad, IIIT Hyderabad, Panjab University and Chandigarh University.

On searching google you may educate yourself more. If you want to work in the most sophisticated world of AI just go for it.

I hope my answer helps. All the very best for your future endeavors!