By Sheri Linden Senior Copy Editor/Film Critic Big Girls Don’t Cry is notable for two impressive debuts: It’s writer-director Paloma Schneideman’s first feature, and its star, Ani Palmer, has never before acted onscreen. Together, they illuminate a messy, searching vibrancy in the story of Sid, a sex-curious small-town 14-year-old who wants more than anything to be cool. The movie — the first produced feature from A Wave in the Ocean, a filmmaking course led by Jane Campion — is alive to the ways that girls, eager for acceptance, can pretend to be tougher and more experienced than they are, and adds the complicating element of queer attraction to the emotional confusion.…