I have some experience. I wouldn't compare it to weed at all. Start small and see how it makes you feel. Don't take a hero's dose.

It takes a bit for them to kick in, maybe half an hour. When I start to feel giddy in my stomach I know they're kicking in. Expect for some visuals. My favorite part was watching my patterned curtains breathe. I once took some while I was on my period and spent a fair amount of time contemplating how I was some sort of earth goddess. You will be high for 4 - 6 hours, but not high-high for that whole time. There's a ramp up and a cool down. You might feel more comfortable with another person there or you might not. Have snacks at the ready. For some reason nuts were really appealing.

I've never had a bad experience, but I have seen people who took more than they should have really not enjoying it. It will end and you won't die. I'd do them again if I had some.