Lean into the tension and away from the certainty
The problem with choosing unhappiness over uncertainty is that uncertainty is where all growth comes from.
Seth Godin calls it tension which he defines as not knowing whether something is going to succeed or not.
The happiest people I know in the music business intentionally put themselves in situations where they don't know whether it's going to go well or not. And they do it regularly.
This goes for teachers attempting to teach new material or teaching old material in a brand new way. This goes for performers playing in new genres or completely reimagining some aspect of performance. This goes for musicians trying new approaches in the practice room.
It can be applied to literally any aspect of the music business.
The bottom line is you must lean into the tension and away from the certainty. You'll be happy you did.