Not to belabor the importance of owning your email account, but switching isn’t even as big a deal as it seems. Some bad habits last year had me wind up with important email conversations happening in a Gmail account that had originally been for junk. I set-up a second Fastmail account and the Gmail account is pretty much back to junk email. The process took a few days of updating email addresses with people, but it feels at least 90% done.
Start the switch and you’ll see it’s easy to finish.
Switch From Your Internet Provider’s Email to Something Better | The New York Times