Wait until your baby turns one. They need steady head control and the ability...

https://smoothdecorator.com/cold-weather-biking-what-should-your-baby-wear-in-a-bike-seat/

Wait until your baby turns one. They need steady head control and the ability to sit unsupported. Choose front seats for connection, rear mounts for stability, or trailers for extra safety. Always pick the option that fits your bike frame best