(To be a consultant)

Step 1: Complete MBBS.
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Step 2: Complete Internship.
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Step 3: Achive Medical License by licensing exam or automatically after completing MBBS. (countrywise difference)
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Step 4: Consider age limit to enter jobs.
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Step 5: (safe): Join as a 'General Practitioner' and receive postgraduation degrees later.
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Step 6: Complete 'MD' or 'Fellowship'.
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Step 7: Become a specialist on particular subject.
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Final step: Work as a fully independent specialist/consultant.

(To be a surgeon)

Step 1: Complete MBBS.
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Step 2: Complete Internship.
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Step 3: Achive Medical License by licensing exam or automatically after completing MBBS. (countrywise difference)
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Step 4: Consider age limit to enter jobs.
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Step 5: (safe): Join as a 'General Practitioner' and receive postgraduation degrees later.
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Step 6: Complete 'MS' or 'Fellowship'.
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Step 7: Receive enough training.
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Step 8: Become a specialist on particular subject.
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Final step: Work as a fully independent surgeon.

(To be a researcher)

Step 1: Complete MBBS.
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Step 2: Complete Internship.
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Step 3: Achive Medical License by licensing exam or automatically after completing MBBS. (countrywise difference)
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Step 4: Join as a 'General Practitioner' to explore your perfect research topic.
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Step 5: Find scopes to achive 'PhD' on your chosen topic.
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Step 6: Receive 'Doctorate' degree by completing PhD.
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Step 7: Find routes to be a professor in a medical school or any suitable institution.
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Step 8: (Optional): Receive 'Post-Doctorate' degrees.
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Final step: Continue as a researcher.