Once I buy the iPhone 12 mini I have prepared everything to de-google the last bit of it. I will only keep the old gmail address but not for logins anymore and

Once I buy the iPhone 12 mini I have prepared everything to de-google the last bit of it. I will only keep the old gmail address but not for logins anymore and i will erase every bit of the info. It is the last thing I want to do to be complete google free.