The automatic transition during zooming across all 3 cameras only works in Explore Mode, which must be selected first. This creates one continuous video file.
The new Normal mode camera switching creates separate files for each camera when...
Do you have the controller on a lanyard around your neck?
If so, let it dangle on your midriff, hold the drone up with the one hand, reach down to the control sticks with the other and use thumb and little finger to cross control sticks.
With...
As an option to a simulator, consider an inexpensive "toy" drone with a two-stick controller. They're a great way to develop dexterity with the controls and they're inexpensive and extremely rugged. They're also light enough that they won't...