Hi Charlie,
Try to find places that have a high demand for people wanting to live there but also isn’t crazy expensive. If you can find an up-and-coming area that is on the outskirts of an attractive/appealing place to live, there’s a good chance that the path of progress will eventually move towards your area.
I had the most success investing in areas that felt slightly sketchy but were close enough to good parts of a growing city. You want to invest in places that have small businesses that are popping up, new construction happening for more buildings, and Starbucks!
Do you have Starbucks in Australia? If not, whatever the equivalent to that is, look at where major companies are also expanding to.
Use all of these to start building a list of potential places to invest. Then look at the cashflow numbers and see what makes sense!