Signing in to my wifi

In Settings->Wi-Fi, it will list all networks it can find nearby including your own if its nearby. It will not list it if its not nearby and detected by the iPhone.

If its automatically connecting to one that is not yours, then tap on the (i) icon next to the name and then on "Forget Network". Then look for your network in the list of names and tap on it to connect to it.

Connect to Wi-Fi: link-> Connect to Wi-Fi on your iPhone, iPad, or iPod touch - Apple Support

What do you mean it has “the wrong internet address”? what should be your iPhone 11 exactly?

What are you trying to change?

Please explain in as much detail as possible the issue you are having, and someone may be able to help.