It seems very easy to practice the Corpse/Death/Savasana Pose, but , in fact, this is one of the most difficult ones, because it requires some skills of relaxing your muscles, nerves throughout your body and you have to think that they actually are! You have to relax your mind lso from extra burdens of thoughts and anxieties. Allow your mind to rest assured that your nerves are actually relaxed to the fullest. Don’t burden your mind that they are not. In doing so you you might have to keep your attention to your pace of respiration or breathing as well. This is like fixing your eyes on the unruly student in the class to keep him under control. You are just an non-participant observer to your anxious thoughts as they are just passing clouds on your mind’s sky. You’re not reacting to, not taking any active/ passive efforts to hold and/or let them go(clouds). Then the clouds (of thoughts/anxieties) will just normally pass over you just to see you uninterested.
I have dealt with so elaborately. In case you need help, mail a few lines.