Hello @notaciscoguy
If you have in your hands a capwap AP then you need a WLC. But, stay calm, you can fix this.
Unfortunately, not possible to join a Cisco AP in a third part WLC, not even an open source one. Believe, does exist open source. After all, capwap is a open source standard.
The good news is that this AP model support the new Cisco platform called Mobility Express. This platform allows for a friendly web interface.
The bad news is you need privilege to download the Mobility Express software.
For this, I can't help you. But, if you get the software , I'll help you set the AP.
-If I helped you somehow, please, rate it as useful.-