There is a reason why people say that the bloody first step is the hardest, and that when you’ve started, half the battle is won, blah-blah-blah-blah.
You want to make the change and improve your situation, the only thing for you to do is to start the ball rolling. Nothing’s gonna happen when you sit and mull over lost opportunities, or what would be or could be.
Finish that damn thing and send it out.