Hi..

You ll have to get into an MBBS course in a medical college. This will take 5.5 years after your 12th grade. Then do a postgraduate course in any surgical field of choice which will take another 3 years. If you wish to specialize further such as cardiothoracic surgery or neurosurgery , it will add on a few more years of study. And not to forget the enrrance exams you have to clear in between each.

All the very best.