As this is a paid course I would definitely contact the provider directly asking if they have, or can create, the slide content in accessible format. That is not an unreasonable request.
Brian - Windows 10 Home, 64-Bit, Version 1809, Build 17763
Explanations exist; they have existed for all time; there is always a well-known solution to every human problem — neat, plausible, and wrong.
~ H.L. Mencken, AKA The Sage of Baltimore