1. Where are you located?
2. What is your country of residence (Same as #!?)
3. What is your citizenship?
This will largely determine where you may travel and, within that, the universe of places which will provide the two shots. Depending on location, you may or may not be responsible for associated costs of the vaccine, medical and, of course, where you stay for the roughly 3 weeks between doses (presuming that you ultimately settle on a 2-dose regime).
Be very careful in your selections as there is a massive amount of fraud here and thus assuring that you are dealing with a reputable provider who is not administering a vial of saline solution is more than critical.