Comment by moritonal

Rip the band-aid. You don't own your email, which means all the things you're worried about could at any moment be lost anyway.

Buy a domain, own the MX records, send your emails where-ever you want. Then just try live your life, and anytime you log into something, try swap it over to your new domain.

Keep your gmail, keep it as the backup email. Just reduce your risk.