Your baby should nap in her crib. Sleeping anywhere else, such as on a sofa, in a car seat, in an infant carrier or sling, or even in her stroller, is unsafe. If she does fall asleep on one of these surfaces, move her to her crib as soon as you can.
During the day you may like to have your infant nap nearby, in which case you could use a bassinet for her first month or a portable crib or play yard. Any of these are easier than a crib to move to wherever you happen to be in the house (just don’t move it with your baby inside).