Its not 'done once' and let go, unless you're a master manifester. And yes, there are those who believe it as speaking to God(including myself at times). Reinforcement is nice, but detachment is still important - getting emotionally involved is inviting chaos into your manifestation.
I highly, highly suggest that you read and contemplate more. Most of your questions are answered in many substantial ways already. You're approaching this with, I believe, more rote and ritual than it should be.
I can't spoonfeed you your manifestation. I'm sure if I really felt like it, I could, but then it'll be /my manifestation/, not yours. And you'll learn nothing yourself. So this is still my advice to you: focus on manifesting smaller, easier goals first. Build your faith and your strength, then move on to more difficult goals.
If you wanted to lift a large rock, would you go and try doing that right now, or would you rather work out and develop your muscles first?