Guys! I discovered a way fo dissociating that worked amazingly atleast for me
The thing is, it may have worked well on me because i really like chess, so you gotta know about it in order to do it
So the first step is to be on a comfortable position, then, you can do this with your eyes open or closed, you have to imagine you are on a chess game, it can be during the endgame, mid game or opening, it doesn't matter, now think that you are making moves and the less you focus on your surroundings, the betteŕ your moves are, and you have to make your mind believe that if your body moves or you start to loose focus, you'll make blunders, in that way, your brain, atleast for me, unconciously will make you stay more and more still, and make you focus less and less about everything that isn't your chess game. At some point when you have reached a great state of only thinking about the chess game and nothing else, feel like your brain leaves your head, letting it play more freely without havig to be attatched to your body, now you are just a brain without body playing a chess game, you don't have a body, you are only playing chess as a single brain