Netlify with a static site generator is probably a good place to start. I'd go down this route as you get total flexibility if you want it but can just use an o

Netlify with a static site generator is probably a good place to start. I'd go down this route as you get total flexibility if you want it but can just use an off-the-shelf theme if you don't. If you want something more akin to Tumblr maybe have a look at Ghost.