I'm in my 10th year of lessons (with a 25 year break between years 7 &

and I feel like an idiot for asking this.... but does anyone know a good online resource for the meanings of symbols and dynamics markings? I'm doing this wonderful Schubert Impromptu that I just love. I have a recording of Brendel playing it (show-off that he is) that makes me seethe with envy when I listen to it. I know it's the dynamics that make him play it so much better (and I admit.... a LOT more skill and talent), but I want to play it to the best of my own ability.
I can admit here that I don't actually know what Fz means (well, now I do because I found a very limited resource online), but I don't want to admit it to my teacher.

Can someone give me a site that I can bookmark?