The family is getting used to New Zealand again. It’s a bit like getting used to a new language.
A new language takes you outside your comfort zone. You feel excited but nervous too. You feel slightly threatened. You get tired quite easily.
And so it’s important not to overdo the effort. You don’t want to take yourself into an area of discomfort. Do 5 minutes if 10 minutes is a strain. It’s no so much your getting used to a new language; you are getting used to yourself.
(Of course, wherever I’ve used ‘you’ I mean ‘me’, you understand.)