There have been many posts made on how to "Astral Project" from your body. Astral Projection happens when your body is extremely relaxed and it falls asleep (even breathing will help this process), it's going to be hard to relax, especially when your body is going to try and fight it.
Astral Projection requires your mind to stay awake...You will start feeling a vibration around your body..and you will start feeling your self float upward, this is called the detachment (it's when your spirit is detaching from your body). You can not move through any of this..
Don't get mad if you don't get it the first time, Astral Projection isn't a one day learn, you got to practice and practice.