I’d focus on interplay;
how the structure and relations interact and influence each other within the system.
How does the structure give rise to specific relations and how the relations, in turn, shape and affect the structure.
Of course that’s assuming a structure-first.
You can also go into emergent properties and feedback loops. Most things aren’t creation-from-nothing so it should be safe to do a relations explanation as-if it came first with the given knowledge that yes there was some magical-structure-with-relation-capabilities or some structure-producing-capable-relationings happening
or for a short-cut to interplay, start with applications and work backwards on how the interplay affords the application with the interplay afforded by the interactions between relation and structure…