I’ve been able to identify plants by googling various features of the plant. Otherwise I’d take a piece to my local plant nursery.

So many great answers, and I am unsure if it was mentioned, but you could try reverse image search from a photo of it too maybe.

Just snap a small piece off, see how it goes. It won’t hurt

Agree with the answers already listed here. The people at our local nursery are amazing with what they know.

Local nursery, google, and if still not able to identify in South Australia we can take a cutting to the botanic gardens and they will identify it for you.

Your local nursery will be able to advise you. If you don’t want to break a bit off, take a clear photo, including a close-up of the leaves and they should be able to tell you.

or even take a photo of it, maybe they will be able to identify and help

I am not much of a green thumb, wander down to your local nursery and talk to them aboutit