Resident Visa and Dual Citizenship

Hello my name is Ryan. I am an American planning to move to Lisbon in October of this year. My father was born near Olhão in Algarve, and I have family in Portugal still. So I am kind of doing the opposite of what my father and grandparents did when they came to the U.S., I am going back to their country of origin. I will be keeping my job in the U.S., but working from home remotely in Portugal.

I have some questions about Resident Visa and Dual Citizenship:

I understand that I am eligible for Portuguese Citizenship through my father's birth right. Does anyone else have experience with this? I am wondering how long the process takes if I decide to do it while in Portugal. I was going to do it from the U.S. through the Portuguese Consulate in San Francisco, but they said the process takes up to a year. Will it be significantly quicker if I do it in Lisbon?

Also, am I able to apply for a Resident Visa while in Portugal, or does this need to be done before my trip begins?

Obrigado for your help, and I am happy to be a member of this community.

Até Proximo!

-Ryan