David Dubov has been acting for 40 years. It’s what he studied in school and it’s his passion. But now he’s shaking up things a bit by making his directorial debut with an old, seemingly quaint, seldom performed, four-act play with a cast of 11 — not an obvious choice for a novice. “It’s been in the back of my mind that I might try directing for a while,” says Dubov, 57. “It happens with some actors as we find ourselves aging out of parts.