you really do NOT need a class on using paintsticks...
you can watch videos on youtube cheaper and learn more!
NOthing against Qu, I just took another class on there, but the paint sticks really only require practice and I tell my students to buy some of the fattest crayons they can find and practice rubbing things with those first to get a FEEL/HAND on how the shiva sticks work. I stencil with them, do rubbings, what ever I feel will get the effect I want achieve.