i know very little about the sub tropics..my gardens are in Michigan..
my best advice would be to make a list of the food you enjoy and buy and can grow in your area.
then plan around the trees...put your trees in with some proper
canopy spacing..largest to the north and shortest to the south..if you can bring in forest soil to put in the holes...and bury some bits of wood around them
then begin to plant dynamic accumulators and nitrogen fixers around the trees..and a few insectary plants (herbs are great for that). stick in some of your favorite annual plants if you plan to grow some, but look for perennials that you enjoy eating first.
you might want a fruiting hedge around the property, like blueberries, blackberries, raspberries, grapes, etc..and interplant with some perennials or annuals that you enjoy eating.
feed the soil !!..mulch...water well first year esp