Car seats questions!

Hey all!

I’m new to this group! My fiancé and I just found out we are expecting our newest addition. I am 9 weeks! Couldn’t be more excited!

It’s a little early to start buying a car seat and stuff but I like doing my research and being prepared. My oldest is 6 and he uses a booster seat (larger kind with the back support), my youngest son is just over 3 and he is currently in a forward facing car seat.

I’m just a little worried in how the heck I’m going to be able to fit another car seat in my SUV. Are there any car seats that fit well together, smaller in size, etc.

I drive a Jeep and would like to prepare myself if I have to buy all new car seats so it’ll be safe for them and fit properly.