GrapheneOS can be used alongside the majority of all the apps you use without loss of convenience. Sandboxed Play Services allows this and you still retain ALL security benefits.

If it is a privacy thing you can start by creating a non personally identifiable Google account and from scratch reasses what and how you give any app or service information.

You can do this in a secondary user too while keeping the base owner profile 'clean' and make gradual instead of drastic changes over time as you see fit.