well for it to sound good, you might want to grow out your fingernails a bit. At least until you have about like 5mm of white nail sticking out. Master tremolo is like mastering alternate picking, you can't really be good at all phrases until your exposed to them. There really is no line drawn that separates the master's from the students.

Though, I have been playing flamenco for about 3 years and I wouldnt say I'v mastered it, but I can play alot of music from the technique I have aquired.