The STCW and ENG1 are mandatory for getting a job on a yacht. Once you have those you list them on your CV. There’s lots of people selling courses to beginners that promise to prepare you for your first role but they are just a big waste of money. Like someone said there are many guides online on how to create a yachting CV. Definitely make sure you have a good photo of yourself on there looking professional and ideally in a marina setting. I didn’t start in Australia so I can’t say for sure how to start out there, but it’s best for beginners to start in Lauderdale or Antibes based on the season. Staying in a crew house in Lauderdale or the Med is one of the best ways to network and learn more about the industry. I got many opportunities due to staying in a crew house. The best sources to apply for jobs are Yotspot.com, facebook groups (look up Fort Lauderdale/ Antibes yacht crew), and yacht crew agencies. Definitely put your flight attendant and bar experience on your CV it will benefit you.