but I haven’t find that much information on which labels should I add to set it up.

I’ve not automated creation of records for new services, but I’ve made it easier for myself by making hostname.domain.ext the dynamic DNS (managed by a simple cron job with curl commands interacting with the API), and all service.domain.ext just CNAME to the main record.

I don’t think I’ll be automating the creation of the CNAME records because something tells me I’d end up leaving a bunch of dead service DNS records behind.