Your ability to get jobs is one of the most important things you need to consider . Also the ease of work permits etc.
Also living abroad is not for the faint of heart. If you are a family person you can get homesick alot. You will always have to deal with cultural differences . Nowhere is perfect.
I think you should only live abroad if you are a very adventurous person. Often the grass seems greener on the other side. It is true that everywhere has its positives and negatives but at the end of the day good family, friends and some spirituality is what makes life enjoyable.
Before you go you should research how easy it would be for you to make friends. Some countries/cities have lots of social clubs , some don’t .
Also if you are single in some countries that can be quite challenging as some cities might be quite family oriented so people will tend to stick to themselves.
Also some cities people on the surface might seem friendly but are not really very open to foreigners.
Also how safe is the city you want to move to. Crime rates are very important too.
I think these are the most important things you should consider first.
Then consider the job options and visas etc.
Often it takes a long time to build up true friends etc abroad.
But I would say go for it.!!.
I honestly think Australia/New Zealand is too far away.
Lived in 3 countries myself ha!