Typically a classical symphony especially in the 18th century followed a distinct order of sonata-allegro for an opening or as an introductory. Then the theme and variations which would give way to the minuet and trio. Lastly you can use the rondo and also a sonata I believe. That's just from my experiences from listening to multiple sources of compositions.
An invisible line, known as the 180 DEGREE LINE or AXIS OF ACTION, runs through the space of the scene. The camera can shoot from any position within one side of that line, but it may never cross it. This convention ensures that the shot will have consistent spatial relations and screen directions.
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If you can, take a phone flashlight and shine it in. Another tip is if you have one of those ear things that light up and you can look into people's ears. Try shaking it around just slightly to see if you can hear it in there, if not it has fallen elsewhere.