Girls, hello! Can you tell me, today is our first walk in the fresh a…

Girls, hello! Can you tell me, today is our first walk in the fresh air? It's +20 degrees and sunny, so I'm curious, who has been walking with their baby for such good weather conditions? On the internet they write different information. They say we should start with 20 minutes, but I'd like to know how it works in practice for you. I would like to walk longer. The baby sleeps constantly in the room that is well-ventilated and always fresh air. Thanks for your answers ?