To keep with the spirit of the talk, watch it on the plattform provided by the event: https://media.ccc.de/v/39c3-a-post-american-enshittification-resistant-internet

I would switch ubuntu for debian, but that is more personal preference. As they are mostly the same architecture, there is not much of a learning curve.

Yes, but: this endeavour comes after/along with the development of a unified “open desk”, a replacement solution for the office and collaboration tools from microsoft etc, backed by the federal government. This ensures a base layer of interoperability between offices and makes training probably easier.