The heating element is located in the nozzle, not the base unit at least in most of the stations I’ve seen, so airflow shouldn’t effect the temperature coming out. It takes a lot of practice and it’s best to adjust it to your preference. There really isn’t a “standard” temp and airflow because it varies from both person to person and station to station.
Pick up some practice devices and start practicing. iPad Rehab has a youtube channel you can check out and they offer a repair school you can take as well.