All your “post” type content within your site can both be displayed as a list of posts on a page (and filtered by category or tag), and be output as a RSS feed (also filterable by category or tag).
In order to get a RSS feed, all you do is add the string /feed/ to the end of your post list page’s URL. So for example, the main “post list” page URL for this site is:
So the RSS feed URL for this “posts list” page is:
In addition, you can produce a feed that is filtered by a single category, or tag word, again simply by adding the string /feed/ to it. Here is an example: