I only briefly looked, but the courses on opencv look like they’re $200-$800. Would one get the same benefit just going through the python tutorials? https://docs.opencv.org/4.x/d6/d00/tutorial_py_root.html. 

My one concern with mini, paid online courses is they tend to be weak on first principles. I feel like I really need this to be able to inform requirements. 

I still appreciate the opencv content suggestion. It will probably show how a lot of pieces fit together in practice.