When I went to Australia, I was also worried about the Internet. Roaming from my operator was very expensive, and I did not have time to buy a local SIM card. Then I was advised to try eSIM. I chose eSIM for Australia here https://ohayu.com/esim/australia-au/ The connection took only a couple of minutes, and the Internet worked without interruptions. No problems with settings or activation. The tariff turned out to be advantageous, and I knew exactly how much I would pay, without hidden fees. In general, this is a really good option for tourists who do not want to think about mobile communication, but just use the Internet upon arrival.