SERIES PREMIERE: Amy Sedaris usually is hilarious, but her new showcase series is a mixed bag, with a tone that may not wear well in large doses. In this 10-part comedy series, she plays a TV hostess dispensing advice on cooking, entertaining, exercising, dieting, and other things. Her targets are the likes of Rachel Ray and Martha Stewart – but early tastes of At Home with Amy Sedaris, as a TV character giving advice aimed mostly at female viewers, pale behind Leigh French’s classic, drug-infused “Share a Little Tea with Goldie” sketches from the wonderful 1960s The Smothers Brothers Comedy Hour.