[Kraezymann]

Play your file a bunch, and make sure its exactly how you want it to be

Then leave it for a few days, maybe 5 or 6, and go back to it. Fix all the little mistakes that you notice.

Repeat a couple times until you struggle to find something you don't like about it.

Then send it.

And if it's rejected, pay attention to why and learn from it. There is no reason not to send anything or to be intimidated or whatever. If the file isn't what he wants, then it just isn't what he wants. Make the file for yourself first.