You might have an easier time converting to a different format which Proton Pass can import, rather than the Proton Pass export format. eg. Convert your file to the Bitwarden JSON format (Bitwarden provide examples and documentation on their format) and then import that file into Proton Pass instead. (IIRC they support Bitwarden’s format)

You could try Bluefin (Gnome) or Aurora (KDE). https://projectbluefin.io/ It’s an immutable OS based on Fedora. They have a developer version with certain developer tools pre-installed. The development environment is largely based around containers and virtual environments. eg. Using DevPod to run your software projects within developer containers instead of installing the tools directly on your host operating system.