Looking at the overall picture of CAN based embedded communication, there are constantly new developments and it staying up to date can be challenging. However, the classic CAN variant is still the most dominant used. Here are popular sources of information:
The CAN newsletter by the CAN in Automation organization (CiA)
Educational videos from Embedded Systems Academy
Technical Blog from Embedded Systems Academy
LinkedIn page from Embeded Systems Academy with many technical and application articles on CAN and CANopen