It's not really possible to just use someone else's config unless the printer is literally identical. You may be better off going through the config tool and getting a set of config files of your own to work with and going through the commissioning guide to help get it all setup.
https://configtool.reprapfirmware.org/Start
https://docs.duet3d.com/en/How_to_guides/Commissioning
You can still use the config files from others as examples.
The homing moves are controlled by the homex.g homeyg. homez.g and homeall.g macro files in combination with the M574 command in your config.g
You can find the documentation on stall detection and sensorless homing here: https://docs.duet3d.com/en/User_manual/Connecting_hardware/Sensors_stall_detection
The heater error means you haven't tuned the heater yet. You need to do this for the bed and hotend heater.
You can get info on heater tuning here: https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_tuning
