Unless your aim is to deceive, there's not a meaningful distinction between memoir and fiction. They're marketing categories.

I think that genre distinctions basically boil down to marketing categories, which are outdated. Any time people have an argument about them, they're arguing about something that doesn't exist in any meaningful way that has to do with style or substance or actual content of books.

When you write in the third person, you get to imagine other people's interiority.

I would love it if my book was considered chick-lit or a beach read. That would be great. People would buy my book.

To some extent the shorter the writing assignment is, the harder it is to accomplish, and a blurb is 200 words max. Blurbs are meaningless, and actual people who are buying the books don't care about them at all.

Unless your aim is to deceive, there's not a meaningful distinction between memoir and fiction. They're marketing categories.

Nothing trains you better to write fiction than being really good at writing about your own interiority.