Relationships – one field with multiple post types

Hello and thanks for the plugin

I have a pod for Resources and a pod for Courses. In both of them I need a relationship to both of them so I can display a list of them together. But your field for relationships only allows to relate to one of them. I have searched and found https://www.ads-software.com/support/topic/relationships-one-field-with-multiple-post-types/ that says the solution is to use Link Tables, but because of my poor English I don’t understand how to make it.

For what I understand, I have to create a pod for relations with two relationship fields that relates to each pod (Resources and Courses). Am I correct? And how do I display them ordered by name?

Thanks a lot for any help ??