That's pretty spot on! Everyone has a different take on how they connect the cvs and au selves of the characters, which is fun. How the cv and au selves connect can really be anything and it can be fun to have big differences there too for internal conflict as the cv stuff unrolls for them. Mostly, until memories and powers start getting unlocked, they're completely unaware of their counter cv life until once a month things get a little wild.
Great! We can do family (either aunt or cousins depending on what you figure out for her age). Just spit-balling things based on Google for pbs, let's see what sticks: Charlize Theron, Gal Gadot, Emily Blunt, Svetlana Khodchenkova, Bérénice Bejo, Alexandra Daddario, Zoey Deutch, Sarah Paulson, Lauren Cohan...