@valker , please refer below:
What is initial entry?
Anyone who has been granted Visa 189 (Skilled Independent) must travel to Australia on or before the initial entry date, which is specifically indicated in the Visa Grant letter. Not fulfilling this requirement means the issued visa will be automatically forfeited.
Being granted the Visa 189, you can make your initial entry to any state in Australia and either stay for good or stay for only a certain period of time.