Support for operating the open source

Hey, team
First of all thanks for this open-source, this is awesome. I followed your installation guide and it worked completely fine. But, after that, I don’t seem to know anything: how to add the device in this, after adding the device how to configure that device. I am just a newbie to this software. So it would be a great help if you can help me through this software.
Hoping you would reply to me soon.
thank you!