We are two seniors (widow and widower) wishing to marry. (67 years and 71)

There will not be any working involved.just companionship. We are both seniors and will not be going out to work. I'm Canadian (Guelph, Ontario) and he's American (Falls Church, VA)

We hoped to keep a small residence here in Canada and one in Virginia. We found out last evening that we should have some papers and we're not sure what we need or how to get them.

Can someone help?