PiZero is a pretty solid machine.

I run my micro-homelab on a Pi Zero from 2018. It’s behind Cloudflare tunnels. It runs the apps i need on a DietPi OS within 180MB and it’s uptime is ~8 months.

First time I hear about DietPi OS, does it offer a headless distro?

Yes, you can setup the entire OS through dietpi terminal utilities over ssh.