There are methods where you don’t have to sit still at all, and in fact you don’t need a method at all.
This is the one I use (the Estelle method) : first pick a song- any song, and while listening to it, close your eyes and visualize that one of the characters from your dr are sitting in front of you. Once the song is over, said person will ask you “are you ready to go?”. Once you say yes, visualize that you are following them through a door, and once you step into the room, you start to fall. (Remember this room is completely white.) while you’re falling, let go of your memories from this reality and replace them with the ones from your dr. Once you reach the bottom, you should have shifted into your dr.
Also if you don’t shift, it’s okay, take a little break and try again. I’m sure you’ll shift really soon <3