Usenet Newsgroups with Thunderbird

Screenshots of setting up newsgroups in Thunderbird (Version 100, beta as of 2022-04)

Steps

Install/open Thunderbird

When it's the first time you start Thunderbird, it greets you with a form to setup your existing email account. For Usenet news this step is actually not needed. You might close that dialog/tab.

Close the dialag: Set Up Your Existing Email Address

Instead we chose to set up Newsgroups.

Choose What to Set Up

Create a Usenet identity entering your personal details.
Posting to Usenet can also be done via a pseudonym and an obviously invalid email address, that should then not be by chance a valid addresse, thus it's common to use .invalid as TLD.

Identity

Enter a Usenet server address, e. g. nntp.aioe.org as this server does not need an account creation upfront, cf. https://news.aioe.org

Incoming Server Information

Account Name

Changing server settings to use SSL

All set, but no newsgroups yet

Search for newsgroups to subscribe to, e. g. aioe.test

Subscribe to comp.infosystems.gemini

Download all or only the most recent posts

All set, browse the list of subscribed newsgroups

Enter a newsgroup and browse along the posts for reading