@elena @jan@dytrych.cloud Usually, any linux distribution based on debian should work. Unless they expect specific package versions.
And I would agree with you that self-hosting on a Pi is not beginner friendly but for another reason:
Self-Hosting on a pi, means self-hosting on your own network, if anything goes wrong security wise and someone with bad intentions gets access to the pi, they are in your network. Compared to if they get in the VPS, you might lose data, you might get your vpn banned, but your home network will stay safe.