Note*** Take this information A LITTLE BIT AT A TIME! Perhaps just learn how to find 2nd position. Once you are comfortable with locating 2nd, learn 4th, etc. For 3rd position, see "finding 3rd Position, Vivaldi A minor"
Tuning the violin is difficult. This info is pretty in-depth. There are other videos on Youtube that are better primers for the absolute beginner. Part one in series.