I've always wanted to learn how to scream sing like Maria Brink from the metal band In This Moment. She also sings melodies beautifully. But I was wondering, does it really ruin your voice? Anyone know of a place I can take lessons (in SoCal)? And how long does it take to perfect it? Note: I pretty much have been told that I sing pretty well, hitting many of the octaves on the piano pretty good, so I'm wondering if that's an advantage. Thanks!