There is no one true way to go about getting small business grants in Australia. However, a start may be to look into what you need by making a budget and business plan, and seeing what you lack. If you have a plan of where your small business is going, it will be easier to find a grant that can help you on your way. There are a wealth of grants offered each year from the state, local and national tiers of government, each with their own qualifications and terms of applicability. If you find Australia government grants you can use and think you have a good chance of getting, make sure you qualify, and then you can go about choosing which ones you wish to write proposals for.
You can also take advantage of the Small Business Startup Assessment Tool below and see the tools and resources you need to succeed at launching your business. It takes just a minute and will also tell you if there may be any funding programs available.