How to tell your very Christian mom that your agnostic

Lucy
Very Christian mom who was raised southern baptist and me the very spiritual open minded daughter. What's the best way to say " hey I don't believe in the bible or In Adam an <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> an I don't like going to church anymore".  Thoughts?