Do any of the following:
Choose File > Discover Channels, select channels to follow (, then choose Follow Channel or Follow Topic.
If you’re looking at the stories for a topic or from a channel, choose File > Follow Topic or Follow Channel. You can also click set an option in News settings for the Today and other feeds to show only stories from the channels you follow.
With My Sports in Apple News, you can follow your favorite sports, leagues, teams, athletes, and more. See on your Mac.
Drag an item below Favorites or Following to a different position in the sidebar. (If the sidebar isn’t shown, click in the toolbar, then choose Unfollow Channel.