Problem in building CAN Bus Shield program for LI-PO Battery

I am a beginner of arduino programming. I got a task in which i have to get data from a LI-PO Battery Management System, decode it and to print it on the serial monitor.
I am using Arduino UNO and CAN-BUS Shield v1.1 by LseeStudio.
I have been provided a link through which i get the knowledge that which byte displays what but no idea of implementing it in programming. I only know to initialize a can bus shield. :slightly_frowning_face: :slightly_frowning_face: :slightly_frowning_face:
Here is that link: Elithion Lithiumate manual - Controller CAN specs
if someone here can give me the idea of implementing it in programming,that would be great, and greater if you provide me an exemplary code. :slight_smile: :slight_smile: