If there is an atmosphere inside, it will presumably rotate with the structure & will start imparting the rotation velocity on you as you close to the surface f

If there is an atmosphere inside, it will presumably rotate with the structure & will start imparting the rotation velocity on you as you close to the surface from the hub. Also the surface rotates at potentially quite a high speed compared to you, with likely various structures sticking out, that might smash to you as you get closer, so better watch for that. :)