Not all plants can be grown via cutting... natives especially can be tricky to propagate this way. If you know the name of the plant you want to try to grow then maybe Google to see if it can be grown this way.

The plants that I have grown via cutting are not natives: roses, lavendar and the easiest of all: succulents.

But this is the right time of year to give it a go the soil is starting to warm up and it's moist.

Burke's Backyard website has some good tips for growing via cutting. Essentially you need to choose a piece of the plant that is fairly young and vigorous. Then strip it back of foliage to all but a few leaves. With a knife you can even remove a little of the "skin" of the stem to expose the part of the plant that will grow roots. Dip the cutting into a hormone powder (available from all plant nurseries) to increase the chances of root growth. You could also buy some special cutting mix and plant the cutting in that instead of directly into the soil to give it an extra chance. Keep the cuttings in a sheltered spot out of the wind until they strike.

With regard to natives such as eucalypts I don't think cuttings are always possible. As a general guide the plants that spread easily by forming roots along the stems are the ones that are good for cuttings.

If you want a really easy start to all this I'd buy a succulent from a nursery and divide it up... you can get dozens of new plants out of one small plant. I've filled a whole garden bed from a small handful of suculents cuttings given to me by neighbours... for free... in only about a year.

Goodluck!