I am a Canadian citizen. Me and my husband have applied for green card through my mother in law who is an Amercian citizen .
We have received a letter that informed us that we are scheduled to have an interview in US immigration office in Monteral.
I do have few questions that I was hoping someone in here can help me answering them.
1) what is the process after our interview?
2)how long does it take after the interview to receive our green card?
2) do we have to come to US to receive our green card?
3) do I have to live in US in order to maintain my green card?
4) if not, how often do I have to travel to US and how long do I have to stay?

Thank you