hey,

there are many courses you may go for after completing your MBBS , some of them are listed below

1. MD in anatomy

2. MD in anaethesia

3. MD in aerospace medicine

4. MD in biochemistry

5. MD in dermatology

6. MS pediatric surgery

7. MS plastic surgery

8. MS cardiothoraric surgery

9. MS urology

10. MS cardiac surgery

other than higher studies you may get a government job in health services departments , defense services , employment in hospital chains, opportunities in research and academics

for more details regarding same kindly go through the same

https://medicine.careers360.com/articles/what-after-mbbs

good luck!