Here's backing track number 2.
A mixture of major and melodic minor harmony.
The changes are:-
||: A7sus4 / / / | / / / / | Bb7#11 / / / | / / / / | Dmaj7 / / / | / / / / | C7#11 / / / | / / / / :||
Use A mixolydian for the A7sus4
Use Bb lydian dominant for the Bb7#11
Use D major/lydian for the Dmaj7
Use C lydian dominant C7#11
Try continuous scale exercises, motif playing and free improvisation.
Good luck!