I recently added an RSS feed to my personal blog, hosted on github pages, and I was astonished at just how easy it is. I wish all of my friends just had blogs and RSS feeds instead of Facebook or Instagram accounts.
To highlight how easy it is to add RSS feed to your Jekyll blog: it's a matter of enabling one plugin
It is worth noting, for the pedantic among us, that this feed is technically Atom, not RSS. But as some other commenters have posted out in this very post, most clients seem to treat those interchangeably these days and honestly I don't really understand the difference myself.