On the surface, Jessica Swale would seem to have a lot of beginner’s luck. The first play she ever wrote, “Blue Stockings,” was a massive success with audiences and critics, premiering at Shakespeare’s Globe in 2013. Her first official foray behind the camera as writer-director, a short film titled “Leading Lady Parts,” starred a who’s who of powerhouse women and quickly went viral. And now her feature film debut as writer-director, “Summerland,” comes out this week to warm reviews for its story and lead actors Gemma Arterton and Gugu Mbatha-Raw. She also has several scripts in various stages of development, from her own works to adaptations of Jane Austen’s “Persuasion” and the novel “Longbourn.”