Violin
It takes years of practice to become a good violinist.  A beginner will start with pieces and or exercises that do not require precise or complicated technique in right or left hand.  Some examples of pieces that do not require great technique are Twinkle Twinkle Little Star by Mozart, Children's Song (A German folk tune), and Over the Rainbow.  During these "simple" songs, the violinist will develop fundamental skills necessary for all other techniques, such as proper bow and violin holding.  As the musician develops more and more confidence and skill in both left and right hand, pieces and exercises will become progressively more difficult.  When necessary, they will also learn techniques and skills that will enhance their playing.  Vibrato, smooth bow changes in the right hand, and shifting.