Reply to Short noob ableton/massive question

My friend and I are finally getting to mess with ableton and massive. I was wondering if anyone knows where to get .wav files specifically like dirty bass and hard drums? Also dose anyone know of good tutorials? Im planing on searching but thought id ask. Id be interested into anything on making sound, making drums and drum paterns, and producing electro house or dubstep as far as maybe basic examples of each step u might take to produce a proffesional sounding track or something... Thanks.