In order to learn astral projection, you need to try and harness a tactic that your body already implements on its own. Most importantly, before trying to project, you need to actually believe that it occurs; you cannot travel the astral plane unless you initially believe out-of-body experiences are real. It would be like trying to adhere to a faith that you felt was not real…you’d be going through the motions, but your mind and soul wouldn’t be in it and you would not feel the same kinds of successes your peers feel who do believe in said devotion.
There are a number of different astral projection techniques available for people to use to help them astral project. With every person being an individual, what works for one person will not necessarily work for another. Many people run into difficulties with various methods though, not because the method doesn’t work, they are not able to relax.