Adding devices to chirpstack

Hello. First posting here. I am trying to setup Chirpstack on a RAK Wireless gateway. ChirpStack comes preinstalled and seems to work just fine. However I cant seem to connect a device. The device I am using is an Adafruit RFM95 bonnet at this link: Adafruit LoRa Radio Bonnet with OLED - RFM95W @ 915MHz [RadioFruit] : ID 4074 : $32.50 : Adafruit Industries, Unique & fun DIY electronics and kits. I have two of these and they communicate to each other no problem.
But I want to use a gateway.
Adafruit provides documentation on using the device with The Things Network, but not work Chirpstack. I want to use ChirpStack for a private installation, not connected to Internet.
I cannot figure out how to get this device working with Chirpstack.
Any help someone can give would be very much appreciated.

Hello GaryC

If I understand you right you have 2

Adafruit LoRa Radio Bonnet with OLED - RFM95W @ 915MHz - RadioFruit

end device.
Or these devices are gateways?
What type of gateway would you use?
Brand or specific product?

Can you give a link that Adafruit TTN working documentation?

This is the LoRa architecture.

LoRa and LoRa WAN - big difference. endnodes must be an LoRa WAN spec, not only LoRa to work with ChirpStack.

Any real progress on this issue? Did yo figure it out?