Poor guy just asked a question on a car forum... only get flamed about his ride.

An automatic 300ZX is undoubtedly not the best platform to start drifting with, but the fundamentals are there. I would suggest an event, but to be totally honest with you, I don't foresee you having much fun with the automatic getting scared and upshifting all the time.

If you really want to get the basics down, find some huge, secluded parking lot that you can mess around in without running the risk of nailing a light pole, or curb, or something of that nature. Given your transmission however I would definitely suggest you have your fun in the rain.

Or if you're a little more brave, find some dirt roads, or big open dirt parking lots. The low friction provided by the surface ought to compensate for your heavy car, and it's evil transmission.

Start slow, and go by yourself, or with one other friend. To many cars attract unwanted attention, and by yourself you can start at your own pace; and commit yourself to understanding whats going on dynamically between your car, and the surface of the road. Be advised however, arrogance, and ignorance should never be mixed with performance driving; and trying to show off for people before you really know what you're doing could result in a totaled car.

Good luck in your endeavors sir, just be careful, and be mindful of your environment.