Simple CMS/site generator for my mom?

I'm looking into (headless) CMS services, static site generators,.. but I can't figure out if there's a product which could allow a non technical person to create and host simple web sites? The content itself would mostly be static with few changes per year. Ideally I would do the initial setup and the rest can be managed by a non technical person.

Some of the requirements would be: editable theme support, basic analytics, simple content management, low cost/free, GitHub (or similar) hosting, custom domain support, i18n

I have no idea if I am asking for too much. I guess the alternative would be to look into Hugo/Jekyll/whatever and do the most of the plumbing myself?

Any tips or ideas are welcome!