Miles Heizer isn’t one to pretend that stepping into a role completely unlike himself is always easy. The actor — known for projects like “13 Reasons Why,” “Parenthood” and “Love, Simon” — has often played straight young men navigating coming-of-age stories. “Sure, sure, I’ve tried,” he says with a laugh. Portraying straight characters isn’t exactly in his comfort zone: “I don't think I'm the most convincing straight person.” But with his latest role in Netflix...