After building my new rig, I also made a successful jump from Windows 7 to PopOS. It was mostly a very smooth transition, but I am having real problems with replacing Password Safe I used on Win. I eventually defaulted to using FF for passwords, but it still feels wrong. Password Safe had password generators, space for notes.. lil things that I keep missing.
KeePassXC is also a good option, and I'm considering switching to it.