Create invoices based in service choice

Hi everyone! I have created an automation that my Notion database items and based in status it creates an invoice from a template in Google Docs, finally it uploads it to Google Drive. I have multiple services: dog walking, dog training or petting with different templates. I am new in Make, I was wondering if there is a way to create a function that is like if service= dog training, the template is this… Also if there are multiple services selected by the client to merge the templates, is it possible?

I think I could use an iterator or Router, but I dont know them because I am pretty new. If anyone can if give a hand, I will appreciate it very much!