@dansup @liaizon @pixelfed
Maybe you could have a 'Join Pixelfed' and an 'Expert Mode' button.
When you choose 'Join Pixelfed', you get to a 'Choose a username' page with an input field for your username. Right next to that an '@' and then a wheel/dropdown with a randomly sorted list of server domains that you can choose. New users would still be choosing their server, but it would be abstracted behind customizing your user name.