When Nicolette Robinson made her Broadway debut in “Waitress,” she was not just fond of Sara Bareilles’ hit musical, she had been listening to the cast album cathartically as she went through emotional ups and downs in her own life. We talk about what led up to that Broadway debut night, stepping through the complex engulfing that is “Hamilton” (her husband Leslie Odom Jr. won a Tony for the musical), and what her inner actor needs before that curtain rises.