You can try doing DEILD every other day for example, or something similar, and remember you can(and should) still do reality check after DEILD attempt, and 'DEILDing' from FA can still make you lucid even if it wouldn't count as proper DEILD.
Also the point of DEILD is not to remain completely still, but rather to get into that state between dreaming and waking up and then return into dream with awareness and lucidity, if you accidentally moved it doesn't means that you have failed DEILD as long as you didn't woke up too much.