The part with the 'forget about it' is difficult.
I don't think you need to totally erase it from your mind. This could result in your subconscious to think: oh so you don't care about this order anyway? Ok, cancled.
Not to think about it, means mainly: not to drain the energy from the wish.
It's like you send a message via a dove and you call the dove back by thinking: is this going to work? And the bird comes to show you that the message is still at its leg. Know what I mean?
Instead of not thinking about it at all, you might try the trick to think about the wish as being fullfilled. Like imagining not: Oh I soo wish I had a new car (meaning you know you don't have it) but instead seeing yourself driving around in it.
About the inner voice...there is nothing to learn about it.
Its always there. All you have to learn is to trust in it.
