How do I set up an RSS feed for my website and enable others to subscribe to it?

Hi,

I know this is probably a dumb question, but…here goes. I’ve had requests from visitors to our site blackmothersunited.org to be able to subscribe to an RSS feed, but I don’t know how to set it up or where it would appear. I know how to find our posts – http://blackmothersunited.org/feed/ but that’s as far as it goes. Can you walk me through it?

I’ve looked through the wpmudev forums, but everyone appears to be asking more advanced questions.

Thanks!

Kimberly