Hi Albin,
Along with your purchase of e-CAM30_CUNANO camera, you would have gotten a bootable SD card. You can just simply insert the same into a Jetson NANO development kit (which I assume has SD card boot option), to boot and check streaming.
Also, you will have access to the Release package and documentation of e-CAM30_CUNANO from our webpage: https://www.e-consystems.com/nvidia-cameras/jetson-nano-cameras/3mp-mipi-camera.asp
or our developer website: https://developer.e-consystems.com/
Using the “Getting Started” document, you can learn on how to install the BSP for e-CAM30_CUNANO in your existing Jetson NANO development kit and check streaming.