No irrigation required – winter sprinkler switch off  https://www.watercorporation.com.au/Help-and-advice/Watering-days/Winter-sprinkler-switch-off/Winter-sprinkler-switch-off

Apply a foliar fertilise of Iron and Manganese now to keep the colour in your lawn. Even if the roots have gone dormant the leaf can still take up the foliar feed.

• Collect a random selection of soil samples from across your lawn and garden, and test for alkalinity of acid levels.  

• If there are drainage issues and resultant moss and algae, treat area with gypsum to assist in drainage. 
• Mow fortnightly to monthly at 15-20mm depending on turf variety, refer to https://tgawa.com.au/turf-varieties/