@alexsstockton - here’s what I suggest based on my understanding. This may give you a bit of added flexibility if there’s some variation.
Begin with a dropdown menu of defined options. Then, create individual inputs for each of the fields you wish to have automatically associated with the item.
Once you have the individual inputs created, within the conditions tab of each input, have the “When” reference the dropdown menu’s Item. Then, select the option for “Initial Content” and define what should appear (either using static text or dynamic data). Then, when you run the workflow, reference all of the fields