Hii!
Diploma in orthopaedics is a good course to pursue and if you go for it after mbbs, you can get greater opportunities in India as well as abroad. The starting salary is about INR 1 Lakh to 20 lakhs depending on your qualifications, and experience.
After completing the course, you can opt for careers in health sector such as surgeon, nurse, therapist etc.,
Hope this helps.
Good luck!