Ah, writing in first. Writing in third. I go back and forth. I just completed another first-person novel, but took time to do a draft of it in third. Sometime the narcissism and narrow view of first is exactly what’s called for. What did I learn by revising in third? Not sure, but I came up with some lovely writing (lovely to me) for a scene that takes place on the banks of the Mississippi; unfortunately my first person protag would never have those lovely Mississippi-inspired thoughts, so it all gets cut.