Just ask the guys at the track for help. I'm sure once you guys start coming around more, you'll notice who's there all the time and start to recognize what they are driving. This way, you can watch how their truck/buggy reacts on the track.

I think the best teaching is to go to the track on practice night and play with settings. Try different things. Using one guys set-up might not work for you.
They are good for baseline settings, but maybe your driving style requires something different.

99% of the regulars at Leisure will always take the time to explain what something will effect and what you can do to change something on your R/C.