>>49The basic idea behind astral projection is that you have many "bodies" but one consciousness. The astral projection is you switching your consciousness from the bodies that you're in right now, that help you to function in this world, switch your consciousness to some other bodies, "astral bodies".
Basically what you would do for it is get into that relaxed meditative state where you don't feel your body very much and mind is somewhat or entirely quiet, depending on what you can do, and then just picture yourself walking around your room, then your house and so on. When picturing it try to do it in as many details as possible, make it seem real. After around 3 months of doing that every night for 30-60 mins you should get it so that it actually feels realistic in the imagination. Thats astral projection for dummies.
You can do the whole thingie for like you climbing out of your body or like loading into another consciousness or whatever other rituals are liked in the pop culture of astral projection, but those arn't neccassary. But if you feel that they help you then go ahead and do them.
The stuff displayed everywhere, where you completely fly out of your body and have some profound experience or something is mostly hogus.
Theres a quite good book on astral projection named: art and practice of astral projection by ophiel
try googeling for the pdf version, is a short book.