A little exercise for you to do before you get into the course…
Play a note anywhere on the neck, play the same pitch on the next string up. go back to your original note, then play the same pitch on the next string down.
if that’s easy then go to the next lesson, if not , watch the video and read this text…
A couple of things that will help your understanding of the course –
Firstly thing to know is that there are 12 notes in western music, these include the letters A through G, called the whole notes, as well as notes in between them. We refer to these notes as sharps or flats depending on the situation. Notice there is no sharp or flat between B and C, or E and F. This means that b and c are one fret apart. Whole notes that contain a sharp or flat between them are 2 frets apart. For example A to G.

This is just a little bit of background as to how the guitar actually repeats itself, each string is not a new range, you only get 5 new notes on the next string, the rest are just repeats.
Every note is doubled five fret higher on the string below. Or you could think the reverse and play the note five frets lower on the string above. The only exception being between the G and B string, these strings are 1 fret closer in pitch than the other strings, so the gap is only 4 frets (diagram 2).
Diagram 2