Links to Free Tools provided by regulators across the country - Please note: When you are looking for tools and guidance, nothing beats the regulator pages as first port of call. This is a handful I gathered to assist you however, they have hundreds and I encourage you to get to know all the resources available by visiting their sites and bookmarking their links.
Work health and safety management plan (comcare.gov.au)
https://www.safework.nsw.gov.au/easywhs-beta/your-commitment/template
The pocket guide to construction safety (nsw.gov.au)
WHS eTools : ROI (oir.qld.gov.au)
Safety management - SAFE steps - WorkSafe ACT
Safety resources - WorkSafe ACT
WorkWell Toolkit | WorkSafe Victoria
https://worksafe.tas.gov.au/__data/assets/word_doc/0018/544122/Construction-template-WHS-Management-Plan-2022.docx