I am a psychonaut myself. I have had some very deep trips in my past on psilocybin. I have fell short of reaching what people call ego death that in itself seems to have major impacts on people for the rest of their lives.
I did extreme research and trip report studies before my trips. One thing that I deeply stress to people prior to shroom trips is mental preparation. The scary thing about shrooms atleast, is that the things you're currently battling mentally, can manifest into your trips. I was battling one thing and didn't think much of of it and during an 8 hour trip, had a terrifying experience. But I was somehow able to relay to myself that I have to just let these visions show me what they need to, and it will be over at some point.
The people around you, what they are doing, their energy and vibes all play a factor too. I could never go to some party with random ass people and take a journey. That is too much, with too many variables.
On a side note, I learned about microdosing being tested in mental health. In the meantime while the research is done, I am currently cycling on and off of small doses of psilocybin. It actually has helped with my depression and BPD in ways that no other ssri ever has.
Long story short, if you haven't tried psychedelics and go from zero experience or knowledge, straight into a heroic dose(very high dose), it can break you. Ayuhuasca trips with a shaman guide appear to take you straight to an extreme. I recommend people go to Erowid.com and read trip reports on drugs first to get an understanding on what you're getting yourself into. Shroom trips have changed my life for the better, as far as opening my mind goes. I know that some people just mess with these things for fun, but they are no joke.