One of the biggest mindset shifts that changed everything for us:
Readers buy familiarity with a fresh twist.
They are not hunting for something nobody has ever seen. They want the comfort of their favorite trope, delivered through characters they haven't met yet.
Give them the thing they love. Then surprise them with how you do it.
What is the ONE trope your readers come to you for? Say it in five words or less. I'll go first in the comments.