I’ve never written a memoir but it sounds like you’re writing your way into your story, which is what I tend to do. I think you’re going about it the right way, as in going back and looking for the juicy bits in your memoir!
This is a pretty tedious stage of the writing process, because you’re working out the structure of your book. I’m doing the same at the moment with a novel and some days I feel like tearing my hair out 🙂
Have you given all or parts of your manuscript to a trusted reader? Sometimes it’s good to have some distance from you. You could try this after you redraft, perhaps?
Also, it’s never to late to plan. In fact, while you’re redrafting is the perfect time for it.
Good luck and thanks for being the first to chat! Emily.