Bluesky's 'Discover' feed (the default algo feed that you get when you create your account) is based on _likes_, not follows, so if you never like anything you'll get random nonsense.
You can try using other algo feeds from here: https://bsky.app/feeds and remove the discover feed, or of course you could just use the chronological one.
You can try using other algo feeds from here: https://bsky.app/feeds and remove the discover feed, or of course you could just use the chronological one.