You could start here:
https://www.stratacommunity.org.au/understanding-strata/self-managed-strata-schemes
Make sure you have a copy of the strata legislation and your by-laws
Do your homework before you go down this path, it’s not always smooth sailing in managing a strata scheme, particularly if it has more than just a few units and you have difficult people living in your block, who are better to deal with at arms length.