Daily TTS Alert to Google Nest Mini w/ Countdown Ability

Hey All,

HA noob here running on a Synology inside Docker.

I’m looking to make a TTS alert that occurs every day at the same time and casts to a Google Nest Mini speaker. I’ve got this part set up.

How can I add in functionality so that anyone can “Hey Google” (at minimum, toggle switch to have the speaker say it – I’m guessing I could automate the toggle) to find out how much time is left until that alert?

The goal here is to have an alert when it’s bed time for the little one. Hoping this gives them a bit of autonomy in their schedule and help teach time management.