Canada

I will suggest you to complete your Masters in Medicine i.e MD, give MCAT (Medical College Admission Test) for USA and Canada. Afterward completing the same you can apply for Post-Doctoral Fellowship or Internship in the same.
You need to get a registered licesure to become a Doctor in countries such as Canada and USA.
However, for graduate studies and Post Doctoral Fellowships in Canada you can check out universities such as:
1. University of Western Ontario
2. Dalhousie University
3. University of British Columbia
4. University of Toronto
I hope this helps. Do write in case of further queries.
Now, for MCAT exam:
MCAT eligibility criteria - Although there is no specific
eligibility criteria of MCAT, aspirants who are planning to apply to health professional institutes can take the MCAT.
The health professional institutes may be categorized as given below:
Allopathic
Osteopathic
Podiatric
Veterinary Medicine
The aspirant will be required to accept a statement verifying your intention to apply to a health professions school. Only then he/she will be considered eligible for MCAT. However, the candidate has to obtain special permission to register for the exam if:
1. He/she is not applying to a health professions school, or
2. Currently, enrolled as a medical student other than MBBS.
It should be noted that if an aspirant holds an MBBS degree already or is in an MBBS program he/she might register for the MCAT exam without seeking special permission.
In order to apply for special permission, candidates can send an e-mail request to AAMC, stating the reasons he/she wishes to take the exam.
Email address to seek special permission: MCAT@aamc.org