Moms of 2 or more...I need your wisdom!

I'm due with boy #2 (if you don't have any boys I still need your advice!) in about 2.5 months. My oldest is currently 20 months, he'll be about 23 months when his little brother comes. I need some advice on transitioning to having 2 kids! Mostly on how to get through that emotional, exhausting, overwhelming newborn phase while also taking care of a toddler. I'm a SAHM and my husband works full time so any advice on that would also be great. Just any piece of advice you can give! Thank you!!! ❤️