Prepping for Baby No.2💜

Currently have a five month old, and expecting baby number two! First baby will be around the 12-month mark by the time the new baby comes, so some items from the first baby will be reused for this one. There’s only a handful of items I think I still need to buy. What kind of dual double strollers do some of you mommas have? I’m also unsure if I need to buy the newborn a new car seat or just pass down the one from the first baby, and buy him a bigger one. I also think I need a bigger diaper bag with more room. What other products have become must-haves for mommas with multiples?? Picture of my first baby so we don’t get lost.