Ship it to Berlin and I’ll bring it when I go home for xmas. No really, Im sure you know someone in EU

Yes you can do this, you can use ANY device/node as an exit-node among your tailscale nodes.

You do need a server to setup the nodes though. Tailscale offer this as a paid service I believe, or you could run your own headscale (open source project) server yourself, this requires a lot more knowledge

Jupiter Broadcasting has nice Linux and FOSS-related podcasts. Most recently with an episode about Red Hat and their decisions.