Well once an object is selected you can press 'f' and it frames the selected object, or go select all then press 'f' to center the whole scene. Then you can rotate and move the camera around from there...but I personally dont know any way of locking a camera around an object (well I do know 1 way, but it would be a nightmare for quick changing on objects).
My suggestion would be to just sit down and start naming the objects, group objects, make layers, and organize the scene. It will make your life so much easier when working on something huge like a set.
Under your perspective window or viewing window go to > view > camera tools > tumble tools option > then use the option attributes there...check the box "tumble on object" on/off. you can also control the rate at which your mouse affects the camera rotation speed...
hope it helps
9 months into Maya...and still learning...
0 experience with any other 3D programs
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