The first starting point for anyone looking to start a business or already trading should be Business Queensland and their indepth Running Business page.
This page will provide clear advice on all elements of running a business, from finance essentials to employing and managing staff, IT, marketing, and legal obligations.
This is a great resource to look at now, such as to learn how to improve your financial performance, and to come back to when you need specific advice, such as how to resolve business disputes, and how to prepare for and recover from natural disasters.