Like what Billie shared, you can put your daughter at infantcare from as early as 2 months old - here's a useful guide that would help in finding a suitable infantcare centre near you!
https://www.dearlittleones.com/single-post/2018/02/15/How-to-Choose-an-InfantChildcare-Centre
Other than that, you can look into family service centres and social workers if you need help in other areas - just locate the nearest FSC to you and let them know about your situation.
If you're working, you are eligible for a working mum subsidy under the childcare - generally the government ones like Sparkletots are cheaper, my son is in full day childcare now for as low as $30.40/month because we have maximum subsidy due to our family situation (am also a single mum, delivered when I was 19 years old - working freelance with little income).