you can't die on shrooms, unless they're not really psyclobin mushrooms and actually poisonous. Which means don't pick them yourself unless you know 100% what you are doing and have an experienced person along. Also when you buy them make sure they're from someone you trust. For you first time, it really depends. Some people say half an eighth, some say a full eighth. If you just want to try them and test what they're like, I'd say get half an eighth, which is what I got my first time. But if you want to have the real shrooms experience, you should probably have more than that, unless the shrooms are really potent. Just don't go over an eighth. Oh yeah you can die on shrooms if you just do something really stupid like jump out a window, but if you're only having an eighth this is hardly possible (you'll still be in control of your own mind.) Actually I've never even heard of someone doing something like jumping out a window on shrooms, so I'm sure you'll be fine. Just make sure not to have a bad trip