Public Health

No, Rupa. You can't get admission in MPH as the eligibility is minimum of 60% marks in aggregate in Bachelor's degree.

Master of Public Health MPH Career Prospects:
This field of Public Health includes components such as:
Environmental Science
Hazardous waste inspection and control
Health-related administration, legislation, laws
Biosecurity, epidemiology, community activism
Sanitarian, disease specialisation
Public health education
Disease analysis
Food service, and coordination. Such postgraduates may explore career opportunities in fields like health care analytics, Big data, GIS, consulting firms, policy related research, evidence-generation, and such. Regards.

Yes, you are eligible for the UGC NET exam, because you completed your PG degree.

Please check for your eligibility to pursue Post Graduate Diploma in Public Health Management from Indian Institute of Public Health, Delhi, Gurgaon. Admission process to pursue this course is also mentioned at this link. Regards. https://www.shiksha.com/medicine-health-sciences/public-health-management/course/post-graduate-diploma-in-public-health-management-indian-institute-of-public-health-gurgaon-171996.

Both are good choices for a sound career after Bachelor of Ayurvedic Medicine and Surgery in the US.
www.iiphgedu.in
This link will provide you with the admission details.