Generally your breakers will trip because of an item you have plugged in the wall outlet. The most common items that will give you troubles are any devices that are outside or pumps of sorts.  

This could be a number of things, even getting a slight tingle off a tap can be a sign of something major that has gone wrong. Best idea at this point is to not touch anything, especially metallic. Call an electrician or your energy distributor straight away. 

Do you have experience in the works required. Electrical work is a very broad field. Did you know for example some apprentices become fully qualified and have only installed solar systems for 4 years. 

This can happen when too much draw is on the one circuit. You can try plug some items into another part of the premises. This is common for people who run large home offices, or people with crypto mining computers. If you keep tripping than get your electrician to run some more circuits back to the main switchboard.  

First check is a visual check. Walk around inside and out and check on everything that is electrical. Don’t forget your appliances and extension cords.

Secondly you can have a look at the switch board. How old is it. Does it have Fuses, circuit breakers or a mixture of switches. Look for and switches that have a button. This is the safety switch test button

As a home owner a couple of things. Press the test button on the detector for 10 seconds. Ensure you replace the battery every 12 months. Replace detectors every 10 years. plus below is copied from qld.gov. Click on the link. Different rules for rentals, home owner, renovations etc. smoke legislation. From 1 January 2022, landlords must install interconnected smoke alarms in residential rental properties

When one goes off, they all go off, giving everyone extra time to escape.

All other dwellings must transition to full compliance by 2027.