Hello @JayFraley,
Welcome to the forum!
normally when there is a failure in obtaining the IP address, is because the APN settings are incorrect. Even the automatic ones received from the provider have issues. So I suggest to check these and enter them manually.
(see How can I Change my APN Settings? for instructions)
Once you have change the APN settings, I suggest you to reset the SIM, you can do this by simply dragging the WAN connection line from priority 1 to disabled, and once disabled drag it back to priority 1.
To find the APN, Username, password do a search on the internet for these for your carrier, very often you can find they are published somewhere. Else you will have to ask your carrier.
If you still have issues with it then I would confirm with your carrier that your SIM is allowed on a data only device (or connected device). Some carriers have restrictions on the SIM usage.