Hi wess.gates,
I wrote an instruction in another thread for MCP2515 module on Jetson.
Although that is verified on Orin NX+p3768, you could also refer to the steps and configuration for MCP2515 on your Jetson Nano.
Jetson Orin NX(JP5.1.2_R35.4.1) mcp2515 can1 can send data, can not recieve data - #10 by KevinFFF