Anywhere between 1.75 and 3.5 grams will definitely make you trip. If it's your first time, I'd recommend starting with 1.75 and wait 1 hour just to see where you are. If you're liking it after an hour you can probably go ahead and eat another 1.75, maybe a little more or a little less depending on how you feel. I wouldn't go over 3.5 your first time, though, if you've never tripped on anything before.

I've never really gotten nausea. I felt something strange in my stomach area, but I wouldn't describe it as unpleasant, just weird. Dried mushrooms usually taste something like ultra-stale popcorn, but go down pretty easily if you chew a little then swallow with some orange juice. I've thrown up a few other things, though. If you must, just get it over with, and continue having fun.

I always trip at night because I think get much better hallucinations, but I have very little experience with daytime tripping, so that's just speculation.

I wouldn't recommend watching a movie. For some reason I try it every time, and I always lose interest in the movie and start staring at the wall or something. Just skip that step and curl up in front of the wall instead of the tube.