it's probably not the right season to start planting a lot of these things - most need to be planted in spring for the best harvest. a lot of the items are coming to the end of their season now (or very soon)

you could probably start preparing an area now if you want to plant for next season - google no-dig vegie patch for ideas on how to prepare areas without having to dig down a lot - you could prepare them over autumn/winter ready for planting early in spring

google "gardening australia veg planting guide" - the first link to come up is a good one for picking your climate and looking at what you can plant each season - it also allows you to see what risks you may have in dealing with the different vegies (caterpillars etc) and some natural solutions to help with that (which is new - off to beak a bit more myself!)