i would suggest gettin a grasp on theory. for instance understand all the diatonic stuff. modes and such like. understand the idea opf using chord tones and sclae tones and how they are different. this might give you the ability to do this

look at the intervals between notes and try to see how the notes in the lead relate to the chords playin over them.


then try and learn about cadences.

if you know all this you have to aply itr and that is often the hard part. i try to look at all the intervals in pieces ive learnt and relate them to the chords.

hope that helps.