What helped when a new baby changed the dynamic

Hi all! I’m a stepmom to three kids (15, 9, and 7). My husband and I have been married for 3 years, and we welcomed a baby last summer. Since having the baby, I feel like we’ve had some trouble blending our family and finding our rhythm again.

I really care about showing up well for everyone and being a good stepmom. I’m wondering if anyone has advice on what I can do to navigate this season better or things that helped you when a new baby changed the dynamic? Or even what things didn’t help so I can avoid those things?