Patrick Frater Asia Bureau ChiefThomasin McKenzie (“Life After Life,” “Jojo Rabbit”) and Devon Terrell (“Rap Shit”) star in “Totally Completely Fine,” a series co-production between Sundance Now and Australia’s Stan, which has now started production in Sydney. McKenzie plays a young woman whose life was a mess even before she inherited her grandfather’s coastal clifftop house and became tasked with helping people who come too close to the edge. Strangely though people respond to her chaotic, nihilistic brand of psychology.