how to get off hotspot back to normal

Settings > Personal Hotspot.. or Settings > Cellular > Personal Hotspot (my phone has both paths), turn off the toggle switch 'Allow Others to Join' so that it does not show green

On the device generating the hotspot go to Settings->Personal Hotspot->Allow others to Join, set it to off.

On the connected devices, simply turn off Wi-Fi or connect to a different network.