When were you brave enough to take public with your baby alone

At which month were you brave enough to go out with your baby alone by public transport , without any 3rd person? Ill be going back and forth to my mum’s (both same estate) everyday and would need to take bus. But my baby is only 1.5months and i still carry him by hand as he hate carrier. Instead of taxi everyday (💸💸), i feel like want to try to take bus one day see how it goes but im so scared my baby would cry murder outside or worst, in the bus, and i wont know what to do.