One of those subjects that is better learned by watching, I think
I don't know much but I know that:
The tea ceremony is for the guests so we should look relaxed and like we are enjoying it.. but in a quiet and respectful way.
We should watch everything carefully and appreciatively..
We should admire the cup upon accepting it.
There is turning of the cups and wiping of the rims and appreciation of the tea.
It is complex