That being said, mushrooms are not very good regardless so you can process them in a way that makes it palatable (teas, blended smoothies, etc). But that won't make that weird nausea feeling disappear, you just get used to it and it slowly becomes unnoticeable as you progress on the "experiment".

The nausea is a response of your body, telling you that you ingested something bad, because that basically what those things are: a poison, just a non-lethal one, and we know the positive fun effects so it makes it worth it, otherwise you would just want to throw up !

also chewing fresh ginger or ginger tea

starting on an empty stomach, of course

but surprisingly, sometimes a little bit of miso soup midway can help with the "gastroparesis" type nausea that can emerge late stage

and also a little bit of diphenhydramine if it's still bad (like less than an antihistamine dose)

even if it is all kind of lipstick on a pig :)

Hallucinogenic experiences are rarely the same. So you can use the same amount of the same batch 3 different times and have 3 totally different experiences.

Some people claim that you can control experiences by contolling "set and setting." I don't buy even that; all we can really say is that the experiences are not consistent between trips and we don't know why.

Taking it alone vs with friends is going to be a dramatic difference on its own, just because of what neural pathways are active when you take them.