If you need to cash out, there are basically two options for how to exchange the SAND into a Australian Dollar. First, you can swap it peer-to-peer with a person who's interested in buying SAND for fiat money. Generally, this option is more anonymous, but it is also less secure. Second, you can sell SAND on specialized crypto exchange platforms such as Binance, Coinbase, Crypto.com or FTX. In case SAND is not listed yet, you might need to swap it into ETH first by using one of the decentralized exchanges.