Single Courses with Practical Application

I currently have a masters degree in organizational performance from Boise State. It focused mainly on learning and development with individual courses going deeper into change management, culture transformation and employee development.

I’ve found myself working in the OD space and would like to learn more about IO Psychology but do not want to do another masters degree. Can anyone recommend online courses that are more practitioner focused? I see CSU markets itself as practitioner focused and was considering individual courses but wasn’t sure if there are other options. Harvard extension also seems to have courses but unsure if it would be more theory based.