You should only follow indexes you trust, or <x id="START_LINK" ctype="x-a" equiv-text="<a>"/>host your own<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>.
You can subscribe to the channel via any ActivityPub-capable fediverse instance.<x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/><x id="LINE_BREAK" ctype="lb" equiv-text="<br />"/> For instance with Mastodon or Pleroma you can type the channel URL in the search box and subscribe there.