I don't have a problem with religion, honestly. It's not for me, but I respect people's beliefs.
I would look at the religions of the world and their holy books as something of "moral guidelines" for how people can live their life, back in the day a bunch of people but these ideas and stories down and said they were "dictated by God" to give people meaning and guidance.
Me, I'm a science guy. Something started it all, but I don't know what that something is. I don't believe anything of the creation stories of any faith.
And no "seven days" isn't a metaphor for billions of years.
