All examples today will be over a ii-V-I in Ebmaj7
So the chords are f minor 7, Bb7, Ebmajor7
The only theory you need to know is what scales fit these chords.
F minor = F dorian
Bb7 = Bb Mixolydian or Bb Altered
Eb Major 7 = Eb Major
Don’t forget to use the resources tab to get the pdf of 25 scale fingerings, these are the fingerings I visualise then scaling the neck