Controll Room Temp via Shelly H&T

Hi,

I’m a bit new to the smart home game, so apologies in advance if the solution is easier than I thought (I’ve been searching the internet for 2 days :D)
I currently have a Shelly TRV and a Shelly H&T both connected to my home assistant via wifi. (not currently planning on implementing mqtt or zigbee)

My basic plan is to regulate the desired temperature on the H&T so that the TRV heats the room temperature to the desired temperature of the H&T.

So far I could only find blueprints that had too many or for me unneccessary features or should fulfil a completely different purpose.

At least some initial friendly help would be appreciated

Many thanks in advance <3