Can I get a picture explaining the neck of a guitar …like i understand a keyboard octaves etc?
The frets of a guitar are similar to the keys on a piano, playing a scale on a guitar involves multiple frets and strings. The guitar follows the traditional music theory A, B, C, D, E, F and G notes with sharp and flat variations just like the piano and most other musical insturments in western civilization that I know of. I included a link with a detailed picture of the neck of a guitar with what each string should be tuned to (E, A, G, B, D and E for a six string guitar in standard tuning). It also lists multiple scales and where to put your fingers to play those scales. With a guitar you can also play chords, which would entail placing your fingers in a certain pattern on all or some of the strings to play a certain note. I also added a link for the chords.