“Please tell me that you’re normal,” pleads Andrew Ridings’s tutor to Kimmy Schmidt (Ellie Kemper), who along with all the other characters in Tina Fey’s sparky comedy, is anything but normal. Indestructibly upbeat Kimmy, who has just emerged from the bunker of a doomsday cult, goes to New York, moves in with Tituss Burgess’s flamboyant, unemployed actor and starts working as a nanny for Jane Krakowski’s rich, lonely Manhattanite. Kemper excels as the resilient 29-year-old in Fey’s very droll sitcom, which comes across like an updated Mary Tyler Moore Show.