GPS/Flight Planner/ATC/Auto Pilot

Hi all. I am trying very hard to learn the relationship between the GPS,
Flight Planner, ATC and Auto Pilot, but it is not easy. I have read and
re-read the FS Manual a number of times, but what is happening is that I am
hardly using the program any more because I am spending so much time reading
the manual.

Is there any really good site with FS tutorials and downloadable flights,
where I can learn how to use these 4 features and how they interrelate with
each other?

--
Dave Schwartz
Commack, NY