This is a very nice little piece by Sor. It's a great warm-up. I usually heard it played faster but wouldn't really suggest that you do that. I tend to like slower interpretations anyways
I do suggest, though, that you play through the piece and identify the spots that make string noise like squeaks and bumps and work that out. Other than that you are on your way to making it sound awesome!
"The tone of a string struck with the fingertip possesses an intrinsic beauty, which affects the deepest feelings of our sensibility, just as air and light permeate space." - Emilio Pujol