Can I learn and develope a castilion accent without living in spain.?

I'm Mexican but I fell in love with Spanish culture. One of the most impact full things was the castilion languege.

It's Peace Corps, capitalized, with a silent "S" on the end.

No, the USA did not send in fake Peace Corps volunteers. Countries have to ask for Peace Corps Volunteers; they are never sent uninvited. President Kennedy started the Peace Corps. President Kennedy ordered (or approved) the Bay of Pigs invasion. That is the ONLY thing they had in common.

President Lyndon Johnson started the "War on Poverty". He escalated the war in Viet Nam. Again, the fact the same president did both is the only thing they had in common.