Let’s see if I can make sense of what I am trying to say. While keeping your wrist fairly straight with your forearm (do not male an L shape!), move your palm forward away from your body. You should be able to see the crease in your palm that starts halfway between your thumb and index finger in front of the fretboard. Now try to fret the chord while keeping the knuckle closest to your fingernails as straight as possible. This will allow you to fret the notes with the tips of your fingers and lessens the chance of muting the adjacent strings.