lordrul,
all you need to start drifting is a car (FF,FR,MR,RR), reasonably good condition tyres and a working handbrake and keep telling urself 'i'm gonna do this, i'm gonna do this' because seriously, there's no better feeling than knowing that you're drifitng because you want to and know that you're in control (what ever makes you happy, skdding or whatever) and not just 'drifitng' because your tyres suck, you hydro-planned or you went into a corner to fast and lifted ur foot of the throttle while turning into the corner as a gut reaction from going in to fast (add some lite braking and u might oversteer!) which btw is a type of drift...anyways.
just look for an open carpark and go during the day if it's not too crowded and throw ur car around abit. it's not gonna feel pain unless you whack a wall or something you know. why go during the day? cause even if the cops come, they can't say ur up to no good because ur in a wide open space by urself (or a friend) practicing. anyway if they do cause trouble just ask for their ID and HQ location la.
happy drifting :)