Maybe a a dumb question but im asking anyway

How mong after baby is born should you keep them home? Im due anyday now and the weather is getting much colder then its been is that going to affect my baby if i decide to take a walk with him around the block? Id like to as soon as possible be able to go for walks and be somewhat active and get him out but i know i have trouble breathing at times if its to cold what about the baby obviously he'll have a jacket and blankets and all that on but is it ok?