If you have a Visa!
live right
In my experience, it would depend on how much US residency the man has and what date he became a US citizen. Children of US citizens are eligible to derive citizenship from their US citizen parents (jus sanguinis), but the citizen parent must meet age and residency requirements.
in Estonia
Yes, Estonia is a great country to live in.
yes just live there
No, the Canadian has to be married to the American in order to live or work in America. Because you have to be married to an American to get a green card in order to do that.
By immigrating to the U.S.A.
If a baby is born within America, even if its parents are from another country, it is automatically an American citizen, and is entitled to the rights and privileges of an American citizen, specially in the USA.
yes
child born abroad of american citizen
The United States of America, or Australia