@offlercrocgod Xbox360 controllers do not have Bluetooth and will require a usb adapter to work. 3rd party adaptors are sold on Amazon and work just fine.
If you wanted to go the Bluetooth route, you need an Xbox one controller WITH BLUETOOTH. Not all have it. Or get a ps4 controller.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first