Watch the scene.
Watch the scene again;
then play in front of the situation;
then watch the scene in mind, and sing, while living the day...sing on and record the voice;
you have certainly more rhythm in your soul than in your instrument;
play your instrument and try the melody; record it; add the armony;
was good?
no?
play the second melody, and the third;
something decent?
"also yes"
bye