When looking for a childcare centre make sure you visit the centre, when you visit observe the physical environment and take note of how the staff interact with the children try and get a sense of how the relationships are between fellow staff members also. Ask about what educational programs they have available for your child and what activities they undertake.
Most childcare centres are set up to look after children while the parents are at work and thus are generally open around business hours. Some childcare centres are open more extended hours and some are able to take your child later for an additional fee. Enquire with a variety of childcare centres to find out what their hours are.
Yes, there are subsidies available from the government to help pay for the cost of placing your child in childcare. Check https://www.humanservices.gov.au/individuals/services/centrelink/child-care-subsidy to find out more about the payments available and the conditions on these.