You don't want to worry about details you don't understand or you don't have time to correct... You don't want to order twice.
You hate do be bothered and anxious because you have a lot to do, and you just need someone trustful and with know-how. And, of course, you need a great result, indeed.
With this gig, you have the chance to have a lot of great advice of a recognized brazilian musician and composer on Web & Youtube.
Just talk to her.