There is no bookstore or library category called Hybrid Memoir, so it’s truly unnecessary to label your book as such. Besides, it doesn’t tell me anything. A hybrid of what? And who cares? At the query stage, this is unimportant because it’s not a selling point.
Use your gifts of words by showing me what your book is about. It’s pretty easy to see the elements that make a book a cross between self-help and memoir. Editors are pretty savvy.
Trying to invent new labels to draw attention to your story could be counterproductive. Just stick to the facts and let your story sell itself.