Bitwarden
It’s core is opensource and you can run your own server if you want.
For my less critical accounts even the 2FA token is stored in it.
Free for teams of 2 (perfect for my wife & me) and has a linux app. Runs great on my thinkpad running pop_os!
And how is the experience?
For 16-18 I used Lubuntu. This required a bunch of little customizations and 3rd party apps to get it close to OSX (the standard for me).
Pop_os didnt require me writing scripts to get the touchbar or brighness keys to work. Plus, since it was bundled with nvidia drivers, it was by far the most seamless install experience. The defaults fit my workflow better than Lubuntu at a minimal cost. It's very slick without taking away functionality.