If your looking to learn how to drift, tbh the mr2 isn't the best car to learn in.
I'm not saying you can't drift an mr2, you can... but its mid engine layout makes it more difficult to master than something that has the engine up front and is rwd.
If your determined to drift in an mr2 then there are a few things you would need to consider, mainly your engine, gear box and whether or not your car has an lsd.
Is your car turbo or n/a?
A turbo mr2 would make a much better base car for drifting than an n/a as almost all turbo 2's come equipped with an lsd and the extra power makes it easier to kick the tail out.
I believe some of the later n/a's did come equipped with an lsd but not all, so its definitely something you should check out in your own car.
Ideally you should ensure your car is serviced well and regularly if your drifting in it as it can take its toll on your car quite quickly, it'll also cost you a lot in tyres.
Those are the main things I'd recommend looking at when starting off, if you were to take it further then you may wish to look at uprated suspension set ups, increasing power, uprated differentials etc.
If you would like to get more info on drifting in general, you should look at the online communities, there are a lot of knowledgeable guys on there that can help you out, I'd recommend the forums on...
Hope this is of some help.