Starting with the carrycot, using this from birth for your day-to-day needs, once baby is able to sit up on their own, around 6 months old, the pram can be changed to have the seat unit on it either facing parent or facing the world. These systems are really convenient for travel, as they can be further adapted with the purchase of adapters and a car seat into a travel system which allows the car seat to be on the pushchair.
Things to consider when purchasing a pushchair would be the size of the basket, the compact size of the pushchair as some parents may often use public transport and the type of pushchair as not everyone’s lifestyle is the same. You may need a more compact folding lightweight pushchair, whereas others may need a more outdoors all terrain pushchairs.