Also found in a !fedibridge@lemmy.dbzer0.com post by @biltong@piefed.co.za : https://piefed.co.za/c/fedibridge/p/22233/post-on-r-buyfromeu-on-the-recent-surge-of-users-to-piefed
I like the way Voyager does it:

DeltaChat also has a very easy onboarding process: you just put your name, and that’s it. The app creates the password in the background and allows you to switch servers easily. That really helps with onboarding new joiners.
Piefed.zip could be a nice default choice. If there are others you see, feel free to suggest.


Trusted instances would have to be set on an instance by instance basis else the old accusations would come out of preloading bias.
This is already the case. Each instance sets their own trusted instances. There are no instances trusted by default. In
/admin/instancesif you click edit in an instance’s row, then you can check the box that it is a trusted instance. Also, these are one-sided relationships. Instance A can mark Instance B as trusted, but the converse is not required.