So for the major scale do I need to learn the e shape major scale and the major scale with open notes too or just the former. As you become more accomplished are you likely to use both those options or would the scale with open notes become little or unused.
Learn the E-shape G Major scale first.
In the future, you will be able to connect it in a different way to A minor pentatonic.
But that is not for here and now.
There are five patterns corresponding to CAGED ...
C-shape
A-shape
G-shape
E-shape
D-shape
For any given major scale, it will have a lowest possible pattern on the guitar neck that maintains the entire pattern, below which, the notes of the pattern get pushed off the edge, below the nut.
For G-Major scale, the lowest possible entire pattern, using the CAGED patterns, is the E-shape.
The G-shape G Major scale would require one single note that is beyond the nut, so the pattern available there is incomplete.
That does not mean you cannot play using the G-Major scale in an open position. In practical terms you would simply forsake 'the pattern' and play what works. Plus, you can make use of open strings which can sound really good sometimes in your play.
But the pattern itself is not complete.
So we say the lowest possible pattern for G Major is the E-shape.
In other keys, the lowest possible patterns will vary.
For C-Major the lowest possible pattern happens to be the C_shape major scale.
For A Major. the lowest possible complete pattern is the G-shape.
Look at these diagrams. And as you do so, remember that as you progress up or down the guitar neck, each of the five major sale patterns overlap and interlink with one another. Moving up away from the nut the patterns go in order C-A-G-E-D. Going back down they reverse that order.
On the left I have put a diagram of the lowest possible complete CAGED major scale pattern for the A, C and G Major scales.
A Major scale - G-shape pattern. If this G-shape pattern was to be moved lower down it would become an A-shape (A comes before G in CAGED).
But looking at the A-shape A Major scale around the 12th fret you can see that some of the notes within that specific pattern would be pushed beyond the nut and off the guitar neck.
C Major scale - C-shape pattern. If this C-shape pattern was to be moved lower down it would become a D-shape (D comes before C in CAGED when it cycles back around).
But looking at the D-shape C Major scale around the 12th fret you can see that some of the notes within that specific pattern would be pushed beyond the nut and off the guitar neck.
G Major scale - E-shape pattern. If this E-shape pattern was to be moved lower down it would become a G-shape (G comes before E in CAGED).
But looking at the G-shape G Major scale around the 12th fret you can see that some of the notes within that specific pattern would be pushed beyond the nut and off the guitar neck.
So the diagrams on the right show the patterns that can not be played as COMPLETE patterns in open position. The yellow highlighted notes get pushed off the guitar neck.
That said, some of those notes are available, including open strings for many of the major scales. And so eventually you will benefit from knowing which notes you can use from the 'open position'.
But again, that is not really for here and now.
You are looking to get unstuck and for some guidance on how to use what you have just learned.
If you are learning to play lead guitar using a scale, as stated, start with minor pentatonic.
It is the easiest of all to start playing lead guitar with, especially over backing tracks and 12-bar blues style.
You can learn the major scale too and I would encourage you to do this if you are learning theory, chord construction etc.
It is the fundamental of the musical language.