PPT Slides here: https://drive.google.com/file/d/10bt9IbLnN-l4LVF7hngXFtIwejvmzKtm/view?usp=sharing
Fr Johnny Go has YouTube lecture series CRITICAL REALISM as a metatheory, (6 lectures of about 20 minutes each) on called "BITE-SIZE CRITICAL REALIST" on this link https://critrealap.net/