As others have already said, each family and what works for them is different.

But I'd like to offer my perspective. I have one brother who is 3 years younger. We've never been particularly close as we are very different people, but we get along well and keep in touch. Our dad died 14 years ago and our mum died last year. I am so grateful to have one other person in my life who has been/is going through it all with me.

Only you can know what will work for your family. Your DD is young still so you have room to keep an open mind.