I've just finished learning the left hand for
Recuerdos de La Alhambra and while I can play tremolo it does not sound overly clear. My teacher suggested two things for me to improve: The first one is moving my right hand fingers less. The second is growing nails (Mine are short as a result of biting, and I don't like the feeling of my nails hitting the strings, which is why I haven't tried growing them before now).
I've tried to reduce the movement of my right hand while playing, but I find it necessary to be able to play the notes loud enough. Growing my nails out will improve volume and therefore allow me to play with less hand movement, but will it affect any of my other guitar playing?