Check with your local agencies- quite often one will be holding a "Car Seat Safety" seminar. They not only can answer all your questions, but often have low cost or even free car seats to install! (Installing can be a big headache, so that is nice.)
For my newborn grandchildren, I prefer the kind where the base stays in the car, and the seat disconnects to carry into the house. You can buy extra bases for these as well.
Blessings to you and your new baby!