Manager’s long-awaited debut comes at Tannadice and more is required despite heavy recruitmentWhether or not it has truly sunk in that he’s finally manager of Glasgow Rangers Football Club, one imagines there won’t be a moment when it feels more real for Derek McInnes than crunching up the gravel path running alongside the Tannadice pitch on Friday night.The 55-year-old will be wearing those buttressed brown brogues he’s already been getting a little bit of heat about from predictable places. When he reaches the visitors’ dugout ahead of the first game against Dundee United and turns to face the pitch, he will know he has the Rangers fans behind him – literally as well as metaphorically speaking.Sections of the away support will be massed over his shoulder in the Jerry Kerr and Fair Play Stands. He wants and needs these fans to remain behind him for the length of his stay at Ibrox. But he knows he won’t get by simply because he is one of them and, to quote many of these fans who welcomed his appointment, ‘back home’.Derek McInnes takes charge of Rangers for the first time on Friday night…