Responsible Service of Alcohol or RSA provides is a course that certifies that the person is reliable enough to work in a business establishment that serves alcohol. Either you are simply planning to have a parttime or to have a serious career that includes serving alcoholic beverages then you must have the RSA certificate to qualify a position.
If you wish to continue working in Australia then it is crucial for you to acquire an RSA certificate. Everybody involved in selling alcoholic drinks should know the importance in serving the drink and it can be learned in the RSA course. Without the certificate you cannot work in business establishments that sell alcohols.