We have a VW Golf hatchback and a Peugeot 406 estate. The Golf is going soon as its too small and only 3 door. We then plan to get a Renault Scenic as it has higher seats all round so no bending down to battle with car seats, a decent boot space and you can remove back seats randomly so have different back seating arrangements. We are keeping the estate as we have dogs and chickens and other animals. Plus we live rural and throw in wellies, waterproofs and goodness knows what else in there
I think you need to make a list of your needs and wants where a new car is concerned.
For example -
Do you hope to have more than one child in the next few years? If you are rural village living and need to travel to school etc, will you possibly be sharing school runs with other mums and therefore need to have room for extra car seats possibly? A people carrier is all well and good, but if you won't use the 2 extra seats, I'd not worry much. If you hope for another child then 2 large car seats is the max in the back seat. So friends kids would be a non starter in a 5 seater. Until they were older and on booster seats.
Do you have pets, dogs? If so an estate is a good idea as trying to fit dog, shopping and buggy into small boots is never nice.
Do you use your car for holidays or long distance travel or is it going to be local only?
Safety factors for your LO and yourselves. Many newer cars come with rear seat airbags/side airbags etc so you need to research if this is safe with baby carriers etc.
I'd say chances are a decent 5 door car, with a decent size bootspace would be fine. You need to go to showrooms to check them out, test drive and find what works for you. I'd not go for any sporty or flashier models as kids do make a mess and things like leather seats are not nice to clean vomit off of