good tp hear that u plan next one. however, I am afraid that australia has too symtrical shape so it may be boring in some aspects (like big usa or big poland) - how bout trying sth more irregular? My advice would be Hong-Kong province:
http://store.mapsofworld.com/image/cache/data/digital-maps/HongKong-country-map-750-900x700.jpg
Edited 8/15/2016 20:07:07