A: If you are starting a not-for-profit NFP organization, you have to be very careful it's not a scam or a fraud, cos you could find yourself in lots of trouble. Just sayin'. In Australia there are non-incorporated organizations, incorporated organizations, and companies limited by guarantee. Each of these has a history of organizing that tells you a lot about what you should be doing, so do some background reading.
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A: Many businesses just need an ABN to get started. Some businesses need a licence, others don't. Best to check with your state business regulator, if you're not sure. To find out if you need to go down that track, best to have a chat with someone already running a business like this nearby.
A: In Australia you can get started straight away, just contact the ATO and ask for your ABN and get started.
https://abr.gov.au/For-Business,-Super-f...
https://abr.gov.au/For-Business,-Super-f...