One thing you might want to bear in mind, because many people dont, is do not buy too much of anything if you are wanting to try a few different varieties.
All you end up with is so much hash/weed on the last day that you dont know what to do with it all!
Some coffeeshops have better stock than others, so do look around.
And i would recommend buying a little book called the Smokers Guide. It basically tells you everything you need to know..

Have fun, get wasted and f**ked if that takes your fancy!!