Chocolates are usually left with the breakfast room service hanger and Daily Programme on the bed at turndown.
Thanks for your final summary, it was very interesting.
There will be entertainment in all the normal venues at some point in the evening. Our first time celebrating NYE was on QM2 in the Caribbean where we rang in the New Year in different time zones in different parts of the ship !
I've only seen the Madeira fireworks from land, I'd love to see them from a ship.