PARK CITY, Utah — Will Ferrell remembers the email well, with the subject line, “Here’s a Weird One.” It came from his dear friend, Harper Steele, who had been hired as a writer on “Saturday Night Live” the same week that Ferrell had been named to the cast, and who collaborated on some of Ferrell’s most famous sketches. And now Steele was writing to say that it was time, at 61, to stop hiding and begin living as a woman. Steele would be using she/her pronouns but hadn’t yet settled on a name, and was hoping for understanding from family and friends on what would surely be a slow and awkward and terrifying and joyous journey.