This is a basic e-book on learning the language of music with improvisation. There are six sections with enough information to get you going, then a video that will show what is to be learned and practiced.
The first section is on the major scale itself and how it is built.
The second section is on the beat.
And the third section is improvising on the major scale.
And three more sections on improvising on songs, with one on improvising for the beginning piano student.