The fretboard isn’t set out as obviously as the piano keyboard. It takes a little more effort to learn the names of all the notes. And you should start as early as possible.
The open strings are (low to high) EADGBE
The note A can be played on each string. This ABC Exercise plays the phrase ABC on each string. You could play a longer phrase, building up to the whole A minor scale.
Notice where the octave is (second example on the TAB file). On the lower strings, the octave is two strings and two frets across. On the D and G strings, the shape is a fret longer. This is a very important shape, and knowing it will help you learn where all the notes are.
Obviously, this exercise can be adapted to different phrases. ABC is a very easy phrase, since the left hand does the same in each position.
