Looking for device for Home Assistant

Hi everyone. I'm looking for a device to install Home Assistant on to manage a smart thermostat, a programmable light bulb (on and off), and another lamp in my house. Since I'll be doing other work in the future, I want to use Home Assistant to be ready for the future.

That said, I'm looking for a device (a Mini PC, a Pi, etc.) that consumes very little power, as I'll be using it exclusively for this purpose. Do you have any suggestions? Thank you in advance!