I feel stupid for asking this 😂

I have the car seat for the baby but I haven’t found the correct stroller that I can put the car seat in... i don’t even know if there is one haha. I had this passed down to me. Do I need to get a separate stroller? I really wanted a stroller that I could use right away. Most strollers seem like they are for older baby’s and not newborns. Anyways hopefully this isn’t a really stupid question..

Also can I just put an insert in the car seat for support when the baby is still a newborn?