I find that a good approach to the classical guitar, is to start from the right-hand technique to arpeggios with open strings, that is, without using his left hand on the keyboard. The right hand is responsible for the production of sound, so it has a very important task. The position should be natural and relaxed, so if you find that there are tensions, while exercising, melt the wrist and try the position again. I chose three videos that explain well the necessary technical, good vision.