I would need advice on what feature trees to choose for my front yard and what trees to be planted for my back yard (would prefer some fruit trees in the back yard) and also suggestions on what small plants and shrubs to be planted for my ground cover.. Thank you

No I’m not in Brisbane. Bunnings generally have a limited selection of the more popular natives. Your best best bet will be a local independent nursery. They can order in and give good advice. A lot of native nurseries also sell online and deliver interstate.

a variety of different types of pittosporums (that have different heights, leaf colour and shapes) make a great easy care relaxed evergreen screen underplanted with clivea or agapanthas or similar.. the pittosporums are quick growing and with careful soil preparation and regular watering will quickly grow to cover the fence ..information about varieties and planting for a wide variety of trees and shrubs is readily available on line check informal hedges

The tree would be to replace the silver birch in the photo which doesn't provide much shade.