shrooms can be really fun... don't buy the chocolates, though, get the actual caps and stems so you know what you're eating, take a little more than half an eighth your first time and it should be really enjoyable if you are in good spirits and with good, like-minded people. Your head will go through some pretty weird thought processes and you'll see some light to mild hallucinations but it shouldn't be too intense, should be very fun, give you great body buzz and make you in a laughy, giggly-type mood.
Shrooms are fuckin dope, if you do a whole lot at once they can get you pretty crazy, but if you know how much you're doing and take an appropriate amount, it's loads of fun and can really be an enlightening-type experience. Think indians and peyodi for spiritual experience.