Jon Bon Jovi is taking things “step by step” following his vocal surgery. The 62-year-old rock star – who opens up about his life and career in the upcoming Disney+ documentary ‘Thank You, Goodnight: The Bon Jovi Story’ – is still in vocal therapy after undergoing surgery in 2022 but admitted that he is “getting back” to performing after taking to the stage in Tennessee with his band. He told People: “We performed last night in Nashville, and everything was very good. So step by step, I’m getting back to it.” The ‘Livin’ On A Prayer’ hitmaker recently admitted that although he is “not quite th…