So, I had screenshots to share showing the details of the answers to all your questions! However, Discourse would only let me upload one and not more and it felt out of context to just have one.
Have you created the content types you describe?
Is there a multi reference field on the practitioner for the instructors?
Have you created entries of both the practitioner and instructor content types?
YES - only through the web CMS interface but with these references specified pointing to other existing entities.
Are you creating the entries using the web app or solely via the API?
I can create an entry via the API if I don’t include the reference.
------- OK, what I believe I need ------
Is just an example of a JSON structure for a CREATE post of an entity that include a reference to another existing entity. Is that anywhere in your documentation?
I haven’t been able to find it. I can also add the screenshots I mentioned if you can change my Discourse profile to allow it.