I found it hard to believe that Andromeda would be six times larger in the night sky than the moon, so I searched online and discovered this article showing what the galaxy would look like if it were brighter: https://petapixel.com/2014/12/08/photos-night-sky-look-like-...
You can see it with the naked eye in a very dark place. It looks like a big brighter smudged area, a little off the plane of the milky way. And it does appear a lot bigger than the moon.
Wow. TIL.