memoir takes shape in stages
Hi Semmie,
This is a great topic. But I don't think it's actually a "question" in the sense that it might have an answer. It's more like a conversation starter, and food for thought.
For one thing, a memoir is really about your own story, so if your brother hit you, that's your story. If he kissed his wife, that's his story. There's no real reason to keep it in a memoir, and for family harmony you could take it out. But naturally if he beat you, he wouldn't want you to write about it, even though you feel it is an important part of your childhood. So if you need to tell it, then it's yours to tell.
So that's what I mean by stages. The first step is for you to try to get your life on paper. The second step is to try to develop the narrative. How did it all play out? What is important for you to tell.
You might find that by writing the story, you become a more powerful aware person, and decide which parts of your life are yours to tell. Or you might find all sorts of insights, but decide it isn't that important for the story. Or some other variation, specific to your situation.
In my opinion, one of the last steps is worrying about your family's privacy. When I showed my sister my memoir, she begged me to "correct" an incident that happened 40 years ago. I didn't mind, because fixing it made her happy and didn't bother me. But when she saw a story I told about my mother, we both laughed. She loved the story. Through it all, I've grown to understand so much more about how my life played out over time, and I've grown to understand how stories work, and I understand more about my family. It's all good.
Just get started, and keep writing. You'll figure it out.
Jerry