I see from you profile you are from Spain. Is 'Spanish Romance' actually from Spain?
A guitar school from Iceland has public domain music, you may like the Romance, from this link http://www.eythorsson.com/
It is quite easy to start with, then moves on to some barres - but even if you can't play all of it now, it is a lovely tune. There are also a few versions (including one with extral tremalo) on youtube, so you can get an idea of optimum speed.