You don't need them to believe.
It's literally irrelevant.
Stop worrying about who believes in you and who doesn't.
Focus on the work you are putting in.
The believers will come...
But by the time they do...
You won't care who believes in you and who doesn't...
You'll believe in yourself.
Nothing matters more than that.
So get to work and make a believer out of yourself...
Fuck everything else.