It's not hard...
For most throws, you essentially keep the disc flat throughout and flick your wrist (coming from abt 3 yrs of practice playing casual catch and ultimate)
also, incorporate your body once you get the fundamentals down for some additional power.
look for some teams that play nearby .
Also, I suggest buying a discraft disc if you're going to play. Much better than wham-o imo and also better in the eyes of most players.