Just adopted a 7month old. Have some puppy blues due to cats reactions.

Basically, yesterday we took home a boxer mix puppy. He is super sweet and not aggressive, just playful and hyper. Cats are NOT happy, which I obviously expected. I bought them a gate, have done introductions through the baby gate but one of my cats actually came out on her own and slept near him which was good I suppose, but she also acts like she wants nothing to do with him. My certified anxiety cat is getting progressively more upset, and I’m worried that I’m a horrible cat mom for adopting a puppy. I’m trying to train him to be calm around them but he just gets so excited and wants to play.

I’m basically just seeking reassurance that it will get better! I know it’s only been a day but I’m just so worried about my cats because they are my first babies and deep down I’m worried I’ve made a mistake.