It can run on shared hosts like Siteground, Lithium, Green Geeks, Hostgator, as well as VPS platforms like Digital Ocean. The admin interface for making new posts is great, separating it from static site generators. It uses a modified Markdown called Kirbytext which is additive. If you write pure Markdown you'll see it rendered as expected.
No database means no worrying about getting hacked (at least in terms of SQL injection).
If you don't want to build it yourself, there's themes for sale too, despite how niche Kirby is. My own blog is a Kirby theme I bought because I knew if I built it myself, I'd never finish.