Hey!

For pursuing a fellowship from USA after appearing and passing USMLE, you can opt for specialized jobs, like surgery, internal medicine, radiology, family medicine, psychiatry etc. Once you find that, you get practice in your opted/ given field before applying for residency. Once you are successful in getting the residency, many fellowship opportunities are available. For more information regarding the subject, you are advised to visit the following links:

https://www.usmle.org/

https://www.usmle-courses.eu/united-states-medical-licensure-requirements/

https://www.usmle.org/apply/index.html

Hope this helps. All the best!