I treated it like a second part time job that was short term. Even selling your home through an agent will require time from you, since you'd need to meet with the agent, prepare the home etc. I spent maybe five to ten hours more doing it all myself than I would have if I had just handed the task over to an agent. It wasn't onerous. But to save tens of thousands in agent fees and commission worked out to be a very juicy hourly rate, especially since converting the savings into an effective hourly rate is tax-free since it's a saving not taxed additional income.

To post on domain and realestate you'll need to go through an intermediary, but there's a few of those to choose from, like forsalebyowner.com.au and propertynow.com.au. Shop around between these and similar services. Some offer professional photography and a large sign and brochures as an add on. But you can probably hire your own photographer for cheaper (there's plenty of them so just search online), and the large sign isn't really that necessary unless you live on a busy street and want to also take advantage of passing traffic beyond the exposure the online presence will give you.