The site publishes Atom-compatible RSS feeds, one per tag. Every page on the site is tagged with at least one tag, and each tag gets its own feed.
To find a feed for a specific tag, visit /rss/<tag>.xml on this site — for example, rss/all.xml covers all public notes, and /rss/blog.xml covers notes tagged "blog". If you are not sure which tags exist, browse the notes on the home page and look at the tag listings.
To subscribe, copy the full URL (e.g. https://addisonbeck.com/rss/blog.xml) and paste it into any RSS reader.
To follow notes across multiple tags, subscribe to each feed separately in your reader. I wouldn't recommended subscribing to all. Try blog, recipes, and quotes 😄