Have a brooder ready. You may need a cover for it like a frame with hardware cloth or at least chicken wire to keep cats, dogs, little toddler hands out. A water dish the they can not drown in or get completely wet.
Chick feed, a feeder/dish, some type of bedding.
A heat source, I prefer the heating plate type that’s now very commonly available over heat lamps. Chick grit once they start eating stuff other than chick crumbles. I like to put a couple of small branches in the brooder after a few days for entertainment and ‘roosting’ . If the weather is nice I like to take babies outside in the grass for a little bit, otherwise I like to grab a chunk of soil and grass/weeds for them to scratch around once they’re a few days old. Daily bum checks for pasty butt while they’re young…. I’m sure others will have lots of input
Check out the forum on raising baby chicks, it’s really helpful