USMLE

Hi,
You must take either USMLE 1 or MCAT, if you want to pursue PG in medical studies. Most of the programs are not open for international applicants. Another alternative is a specialized Masters such as MS or MA in psychology, for which you can take GRE or GMAT to be considered for admissions. In short, you cannot apply without clearing any entrance.

Dear Gandip,
USMLE is a three step test taken to practice medicine in US. Just be aware that is a tough examination and requires a great deal of hard work and dedication plus knowledge. You must hold relevant qualification to be eligible. Kindly, visit the USMLE website for all details:
http://www.usmle.org/

Hi Divyam, apart from clearing the USMLE you must obtain the state medical license. All decisions regarding acceptance of USMLE results and/or licensure eligibility are made by the individual state medical boards of the United States. Go through USMLE website for details.

Dear Divyam, students normally volunteer and practice with hospitals, clinics and research organisations. You will find details on the USMLE website, please write to them for support. Best Wishes!

Hi,
Here are some articles on US medical education and USMLE:
https://studyabroad.shiksha.com/introduction-to-medical-studies-in-us-articlepage-564
https://studyabroad.shiksha.com/how-to-get-medical-residency-in-us-articlepage-83
https://studyabroad.shiksha.com/all-about-usmle-step-2-exams-clinical-knowledge-and-clinical-skills-articlepage-247
https://studyabroad.shiksha.com/all-about-usmle-step-3-exam-the-final-step-articlepage-281

Admissions in medicines abroad is definitely a stringent process. For master's in psychiatry in Canada, you may check all requirements here.
http://www.canadian-universities.net/Universities/Programs/Psychiatry-Graduate-Prerequisites.html

Yes, USMLE will be required for international students irrespective of the country you do your MBBS from.

You can apply for MS in Public Health or MHA courses which are of two years.

During Spring when candidates are less.