Hi skrivars, I completely understand your reasons for wanting to have an astral projection experience, and the things that go with it- the assurance, the stronger meaning of life, and finding out answers.
I've been interested in it too, for some of the same reasons. I think the answers from the other posters are prety right, it takes practice, like anything else, like riding a bike, being a good dancer, learning something new.
I have some suggestions that i have used myself with success;
To help learn to get to or stay in the bordline sleep state, you can practice during the day with perhaps one of those mind frequency CDs that drive your brainwaves into deep states of relaxation.
The purpose is not to try to have an O.B.E, but to practice reaching a deep sleeplike state while listening, then practice to keeping yourself alert whenever you see dreamlike images or feel yourself drifting off.
For example, when you are deeply relaxed, and began seeing dream-like images as if you are drifting off, then alert yourself and say something like, 'this is a dream' and awaken yourself a little. Then allow yourself to drift off again and do the same thing each time.
If you can keep that up for longer periods, then you are drifting along the borderline sleep state.
As for learning to be relaxed enough during the vibrations, here's an idea- before you lie down to begin your practice, stretch every part of your body, for a few minutes each- feet, legs, torso, chest, shoulder, arms, head.
Do it a number of times.The purpose is to tire your body out so relaxation comes very naturally and quickly, and plus, your limbs won't be as anxious to move because they are relaxing after the stretching.
Counting down from a large number to 0 also helps a lot.
And finally, during the day when you are awake you can practice too, by wondering or questioning every 30 minutes if what you see is a dream..it can possibly prime your mind to do the same thing when you are asleep and dreaming.
Hope this and the other poster's advice helps, skrivars, good luck and take care....