I have a certain way I do astral projection that worked for me from the start.
A dark quiet place
Ok so go to a site like YouTube or any place you can get binaural beats. Find one for lucid dreaming or obe's. take the earbuds and put only one in your ear, leaving the other open. Lay down and begin listening to the beats. As they play listen to the ringing in your other ear. After a few minutes your astral body will try to leave your physical one. At this point just let go. Instead of focusing on getting out, just let it happen. Feel your body getting lighter, and just go with it. Worked for me on first try. Hope it helps