I haven't shot slide film in 30 years: is it still available. What's the go?
In the (distant) past, you bought a cassette of Kodachrome, Agfachrome or Fuji, Ferania, or whatever and they included a little posting bag and, usually, in 2 or 3 weeks a nice cardboard or plastic container would arrive with 24+ or 36+ slides mounted in cardboard or plastic mounts for you to screen with your projector.
What is the scene today (if possible with reference to Australia)?
Can you still buy the film?
Do "they" still process it?
What's happening, and how do you go for it?