hi try this as an exercise,
first get use to the stretch it takes for you to play one octave apart
example
C C / C E G C
get use to this strech then move your thumb to where your pinky is and play the chord again now come back to the original position do this until you are comfortable with those two now practice it with your eyes closed
next do the same thing while addng another octave do it one octave at a time it takes time if you have a prob keeping your eyes closed then turn off the lights
next remove the top note and do the same thing with the triad only
C E G
next change the inversion and do the exersise again
next change the chord to a minor or a seventh and do it again
next add a seccond chord C TO G OR C TO F OR any chord of your chosing. and repeat the exersise
it takes time and practice but persistance will pay off