Firstly you need to prepare for NEET and secure a seat at some of the Good Goverment, State or Private Medical Colleges in India. After MBBS, maybe you may have work experience as a Jr Resident and parallely prepare for NEET PG. Once you clear PG Entrance in India or maybe Abroad, you need to pursue M.Ch/MS/DNB related PG Course followed by a career as an Cardiologist.

For more information do follow the link below

https://www.careers360.com/careers/cardiologist