Degoogling your self is a process and needs to be handled carefully. Realisticly, this quite difficult if your not a fruit phone user, but there is hope for people who arn't neck deep in Apples walled garden. GraphenOS announced last year they would be expanding their range of supported devices. [Link]
Once that happens, closing the ol' google account will be much easier or atleast use a modern smart phone without having it tied to the tornent nexus.