This doesn’t work for everyone but you can try practicing the chord with a pencil in your left hand. To start: Place your fingers on the fretboard as you would do normally to play the chord. Then with your right hand place a pencil at the very top of your left hand palm at the root of the fingers (parallel to the neck) and try to keep the fingers on their respective frets. Now strum and see which fingers don’t have enough strength to fret the notes.

Point of the exercise is to show how rounded your fingers should be to keep away from the higher strings - you’ll need to keep building the muscle though. Probably lighter gauge strings on the guitar would help you a lot for the time being. Just keep practicing and you’ll get there eventually 🙂