Just to add a bit more to David’s comments on the Australian international challenge. It is both a team and individual competition, you don’t have to be part of any team to compete.
There are five stones in the competition and your score is based on the three highest. You don’t have to cut the five stones, I didn’t bother, as long as you cut at least three.
You can also compete in their national competition, which attracts facetors from around the world. That’s a four stone competition, with the entrants being judged on the total of the four stones entered.