Use TTS with switch

Hi, i picked up HA again after a couple of years.
I must say, there are a ton of new features and i like it.

However, i’m using a Google Assistant for 1 month and i would like to integrate it into my HA.
Now i want to start with something easy and i was wondering if this would work.

Is it possible to turn on a switch in HA and that google will say “The switch you’ve selected is turned on”, so like a custom answer when i turn something on?

I’ve check the TTS-topic on the HA site but i’m not quite sure how to use it.

Can anyone help, or provide an example how to do it ?

Many Thanks!