Trying to re-connect to WiFi

I am NOT a computer person. I have tried so many things to re-connect my device. We bought our house last year with the Rachio already installed. I created an account and hooked it up(with difficulty). It was going fine until it was “offline”. My latest thing I’m trying is to update my firmware (again, not a computer person). I am following all kinds of weird directions and I’m about ready to give up.

Please help…