Terrified

I find myself nervous and scared. I'm having a hard time taking a step forward because of my fear.
Some dude put an ad in craigslist, saying that he was looking for musicians for a progressive rock band. And he lives in my town. And he's looking to do 3-part harmony.
I'm qualified for this job.
I emailed him, told him I was interested in finding out more about him.
He emailed back, wants to meet someplace or I should call him. ASAP.
And now I've got an almost irresistible urge to block him from my email, ever call him, slink away from this opportunity.
What's my fucking damage?
I've got all kinds of voices screaming at me.
Literally screaming in my head:

YOU'RE TOO FAT!
YOU'RE TOO MARRIED!
YOU'RE TOO FATHERLY!
NOBODY WANTS TO ROCK OUT TO A MARRIED FAT FATHER!
THEY DIDN'T WANT YOU WHEN YOU WERE THIN AND SINGLE!
THEY DON'T WANT YOU NOW!
ROCKERS HAVE HAIR, AND YOU DON'T!
YOU HAVEN'T DONE THIS IN OVER 4 YEARS!
YOU'VE LOST WHATEVER YOU HAD!
YOU'RE OUT OF PRACTICE!
YOU'RE GOING TO BE REJECTED BY A STRANGER!
YOU'RE FAMILY IS GOING TO SEE EVEN LESS OF YOU IF YOU GET THIS!
YOU HAVE TOO MANY RESPONSIBILITIES TO PLAY AROUND LIKE THIS!
YOU HAVE A JOB THAT YOU NEED TO FOCUS ON!
YOU CAN'T AFFORD PRACTICING TWICE A WEEK LIKE HE WANTS TO!
HE'S STUDYING MUSIC AND YOU DON'T KNOW SHIT ABOUT MUSIC!
YOU'RE A TOURIST!
YOU'RE A WANNABE!
YOU'RE A FUCKING HAS-BEEN!
YOU'RE NOTHING!
YOU'RE PATHETIC!
YOU'RE FUCKING WORTHLESS!
HE'S GONNA SEE YOU AND LAUGH AND GET UP AND LEAVE!
YOU'RE A MISERABLE PIECE OF SHIT AND DESERVE TO WORK FOR THE GOVERNMENT!
YOU'RE AN IDIOT!
GIVE UP!
GIVE UP NOW!
THE LONGER YOU WAIT TO GIVE UP, THE MORE HURT WILL HAPPEN!
LET YOUR INSIDES DIE SO THE PAIN WILL STOP!
YOU'RE A FUCKING LOSER!
GODDAM LOSER!
FUCKING, GODDAM LOSER!
GIVE UP, LOSER!

And I could go on like this.
Even after all that, they're still yelling at me.
I'm just typing, and they're yelling at me.
I'm not even looking at the email he sent me, and my voices are screaming at me.
Usually I can type them out and get some relief.
It didn't work this time.

Looks like I gotta start all over or give up.
What was isn't now.
So do I take that step forward?
Will I get out of my own way long enough to take that first step forward?
I don't know.