Need help to finish a song

Hi I need help finishing writing a song. I have most of the melody for the verses bridge and chorus but would like some help in transitioning part and adding a bit more color to it. Song genre: pop in a very 70s Carly Simon style Thank you

Additional info:
I'm an indie artist. I'm interested in working with a very experienced mixer. The song has less than 10 tracks recorded that need mixing. . I don't have a hard deadline for this.