Q.Sand
I live near the coast in Burrum Heads Qld and would love to start a vegetable garden but all I have to plant in is sand. I realise I can add compost but there is still nothing to hold moisture. What else can I add to bulk up the sand?
I'm listed links for you regarding amending your soil.
I would suggest you try gardening in containers or raised beds.
You can then control the soil.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/amending-sandy-soil.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/vegetable-garden-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/
https://www.gardeningknowhow.com/edible/vegetables/vgen/raised-vegetable-gardens.htm
https://www.gardeningknowhow.com/special/containers/designing-your-container-vegetable-garden.htm