…Make a subscription containing interesting newsgroups
Choose New Subscription from the Subscriptions menu. Click on the name of the resulting icon and type to rename it. Open the All Newsgroups subscription. Drag interesting newsgroups to the newly-created subscription — either to the icon, or to the newsgroups (top) pane in the open window. You can also use the Add Newsgroup command in the Reading menu if your reading window is open.