What's the best encrypted email for personal use for simplifying my digital life?

I’ve been trying to cut down on the digital clutter in my life and one of the things I realized is how messy my email setup has become. I’ve got old accounts all over the place, random promotions, and services I don’t even remember signing up for. I want to move to something more intentional and private instead of sticking with the big ad driven inbox I’ve been using forever.

I’m looking for an email service that keeps things simple. End to end encryption, no ads, no tracking, ideally open source or at least independently audited. Something that feels aligned with digital minimalism instead of fighting against it.

For anyone here who’s been simplifying their digital life, what encrypted email are you using that fits a minimalist approach?