This might help re times to travel. Get a BIG map and see where you want to go to
https://www.aboutaustralia.com/travel-tips/best-time-to-travel-to-australia/
http://www.outbackcrossing.com.au/Touring/The_Best_Time_to_Travel_Australia.shtml
https://news.experienceoz.com.au/when-to-visit