About this Beginner Violin Music Theory Lesson
When you are starting to learn the violin, it is essential to understand the difference between F and F# on the fingerboard.
As a beginner, you are most likely going to learn F# on the violin, which is second finger in the position away from your first finger on the D string. This is the position of the F note, when you are playing in the key of G or D.
When you have a song in the key of C (no sharps or flats in the key), this F position changes to being next to your first finger, instead of away from it.