Hi, everyone! All time I studied violin was with classical music, and now I'm trying to learn the fiddle style, but I'm having problems with it. I'm not figuring out how do I make those dinamics, that characterystic sound of fiddling. Can anyone help me with some tips to begin fiddling?

I read somewhere that fiddling can't be based on the sheet music, the most of the fiddling comes from the improvisation. If that's true, how can I improve the improvisation? And which are the techniques most used on fiddling?