Not sure if its been mentioned but just say you are learning (playing) the guitar and need long nails ...
but that is only on ONE hand. The other has to be short. And of course, if someone asked you to play something, you might give yourself away if you instead pulled out a tuba becuase you can't play the guitar.
The crossdressing community is one that needs to stick together and continue to be there for each other for whatever one needs. We are always trying to improve the forum to better serve the crossdresser in all of us.