This year our veggies are doing sooo much better thanks to using a "leaky hose" - you get them from Bunnings, they're black hoses and they weep. They're water efficient and very effective. Highly recommended.
We have lots of greens - cos lettuce, kale, weeds

, cuc's, peas, tomatoes, zucchini, squash and herbs (but our garden is quite big) but mainly greens
im in qld, water restrictions..im only allowed to use a watering can i think.
im only guessing but i think i would have about 5msq usable garden bed. Theres a raised narrow garden bed running down the side on the house that looks like it would have great drainage.