C major scale fingering
C major scale has no sharp and no flat.
Notes in the scale are ...
C D E F G A B C
This is your left hand. As you can see on the keyboard, you start the left hand major scale with the finger #5 to play the C and then you use finger 4, 3, 2, and 1 to play D E F and G.
Then you cross over and you play A B C with fingers 3 2 and 1.
This is your right hand. As you can see on the keyboard, you start the right hand major scale with the finger #1 to play the C and then you use finger 2 and 3 to play D and E.
Then you cross UNDER and you play F G A B C with fingers 1, 2, 3, 4 and 5.