By reading about the new inclementations on Google I decided to leave from Google services entirely, already stoping using Windows for 6 month and Chrome, but sttil dont sure about a gmail(Some important things are signed in gmail accont) and some services like Youtube and some android telemetry(already rooted)
You’ll still need email hosted by someone else, even if you are self hosting, in order to sign up to domain registrar etc.
It’s very poor idea to use the same domain for contact from a registrar.