To become a baker in Australia, you need a certificate 2 in baking from TAFE, followed by a certificate 3 in baking. The certificate 3 in baking is now rarely given unless you're already working in a bakery as an apprentice.
Bakers' Delight Bakery is now offering bakery traineeships (work experience). Contact your local bakery to see if they provide trainee ships.
Bakers' Delight website:
https://www.bakersdelight.com.au/company/careers/