Maybe you haven't tried long enough, it can take a long while.
Fingerpicks are awkward at first, as are long nails.
With training they can become second nature.
Alot of banjoplayers use them and it's really amazing to see them play.
I would however suggest that you make the best of what you have.
Many classical guitarplayers prefer having their nails fairly short.
Segovia always trimmed them so they were no longer than the tips of his fingers.