Ah! Fantastic! I have been wanting to do this exact same project. I have been held back by trying to choose a screen. I want something REALLY dim at night.

In the end, I created a custom watchface for an amazfit band 7 that I had lying around and that worked decently, actually.

You can dim this screen all the way down to where it's hard to read in the dark. I recommend it if you still want to do it.

Looks like a fun little project. Is it possible to program an alarm on that device? Does it have a speaker?

It doesn't, but since it uses a whole ESP8266 module, it's really easy to add one. I'm going to add a light sensor soon, as the time-based brightness is more annoying than I expected.

I haven't tried with ESPhome, but I think it would be easy to add some alarm code. There's no touch screen or other interface, though, so you'd have to set the alarm via Wifi.

This is Cool. If this were on Kickstarter, I'd probably buy it.

You can buy it from Ali (or wherever) and just flash it though USB, but it won't be as plug and play as a finished product.