i want to learn recuerdos de la alhambra by franciso tarrega
but i'm pretty crap at tremolo.

i'm sure i would pick up the technique while learning it but do you think i need to work at my tremolo to get it up to the standard beforehand?
Heres a helpful video for learning the tremelo tecnique, if like a lot of classical guitarists you learned 'Spanish Romance' when you were starting out I suggest you try this , just apply the tremelo tecnique to that piece.

For when you are actually learning 'Recuerdos de la Alhambra' just remember to play it slowly at first, otherwise ot will take you far longer to perfect the piece which is really what its all about.