Recommend pls Cobol courses or tutorials

Help me, please, to start my education path in Cobol. I found these COBOL courses, may be you can suggest anything else. Thank you in advance!

Hi Markul
The Open Mainframe Project has its own COBOL course here:

If you have access to LinkedIn learning, they also have a COBOL course.
IBM have a COBOL fridays webcast, that is also a possibility: