“Late at night my mind would come alive with voices and stories and friends as dear to me as any in the real world. I gave myself up to it, longing for transformation,” quips Winona Ryder as the enviable Jo March in the 1994 film adaptation of Louisa May Alcott’s coming-of-age classic “Little Women.” Just as Alcott’s Jo sought to find her place in the world, so too does Lara of “Girl” strive to establish herself as a woman and artist. With “Girl,” Flemish director Lukas Dhont offers a more contemporary coming-of-age story whose plot turns on the very idea of self-driven metamorphosis. “Girl,” a deceivingly simple title which contains multitudes, is the story of 15 year-old Lara, a transgender girl from Belgium who, like Jo March, longs for transformation. Lara does not only yearn to change her body, but wants more than anything to become a ballerina. The movie frames a period of major transition for Lara: she’s just moved to a new city, is living in a new apartment, is preparing for transition surgery and has begun training at the prestigious Royal Ballet School of Antwerp.