Rebecca Rubin Film and Media ReporterRandall Park is stepping behind the camera for the first time, set to take on directing duties for the upcoming film “Shortcomings.”Based on Adrian Tomine’s graphic novel, the comedic drama follows a trio of young Bay Area urbanites — Ben Tanaka, Miko Hayashi and Alice Kim — as they navigate a range of interpersonal relationships, traversing the country in search of the ideal connection.