Nobody can astral project.
If anyone tells you they can, make them prove it. Create a simple test where you place some objects in a room, then have them astrally project into that room and name all the objects. They won’t be able to do it. No person that’s written a book on it can either. If they could, they would take Randi’s million dollar challenge.
About all anyone will tell you is some form of self hypnosis, which will make you think you’re out of your body.
A lot of methods talk about trying to astrally project right before you go to bed. These people aren’t astrally projecting either, they’re just dreaming.
Trust me, no one can really make any occult stuff work. Not even the famous occultists that wrote books.