If you’d followed Bruh’s guide you would’ve replaced domus1 in the Tasmota MQTT config with your Pi’s IP before flashing!
Regarding your errors in your config yaml, obvious thing to try would be type the correct topics over the top of your incorrect ones, then you’d guarantee the context is OK.
If you’re going to follow a guide it’s a good idea to actually follow it so then it should be quite easy to track down what’s wrong if it doesn’t work
