Beginner ESPHome help

You already know your host setting, it is the IP address from your log. The port is 6053 and should be pre-filled.

Hi
Sorry its been so long since I last updated this. Life very much got in the way…
So. I have started afresh. Clean install of HAOS, brand new ESP32.
Bare YAML file uploaded to the ESP.
ESP is then plugged into power and I can now confirm that it shows up on my network. If I type the IP address in, It loads a basic status screen.
IT also shows up in the “Discovered” tab. However, if I try and configure it, with the correct IP address and port 6053, it fails to connect. This is whether I try and add the one suggested under discovered, or whether I add a new integration manually.
I have also discovered a symptom that may be related, however. I cannot connect to HAOS via wifi. If I try it on my phone or laptop, I just get “Page not found”. On my main PC, connected via ethernet, it works perfectly.
However… I cannot connect to the ESP via ethernet, again, “page not found”. On wifi however, it works perfectly. This may well point to some major configuration error in my network. My knowledge of networking is virtually nil, I have just cobbled what I have together.
Thinking about it now, I have never been able to convince my laptop to connect to my NAS either. I wonder if this is all related.
Any thoughts would be appreciated.
Cheers
Andrew