You can go back from network settings back to settings or something like this. just poke around. Discovered it when comcast went down for 4 days and wanted to run kodi on firetv

Amazon also tends to hide options until you "try" connecting to your network. My device refused to work without internet until I "tried" connecting to my network using an incorrect password. When I did that and the device failed, an option to skip network setup appeared. In small font at the bottom of the screen, of course.