If you want free tier with good privacy practices, Proton is going to be the best option.
I have several paid webhost accounts already, so I just use those for email. Any important messages (which are increasingly rare) are saved to PDF and stored offline (business/tax/medical info, etc.), and the rest is purged once read/sent.
Since adopting a Flatpak and containerized workflow, the choice of distribution matters a lot less to me now than it did 10 years ago.
The majority of apps that I use everyday can be run from any host. And I can install fedora, arch, debian, or whatever I want as a container, whenever I want it, without any thought to my host system.
Ideally, Flatpak’s UX will continue to improve, and upstream app devs will continue to adopt it as an official support channel, which will improve overall security and confidence of the platform. Image-based, atomic distros will be further streamlined, allowing for even more easily interchangeable host images. At that point, traditional distros will be little more than an opinionated collection of command line tools and programming environments.