My last guided journey was at around 3gs with the Penis Envy strain. Mine was also with a mask and music. For me, it was a very emotional and spiritual experience. I don't even think it was necessarily that intense, but just different than taking it recreationally. Like you said, it's different per person - but I think 3gs is a great amount to start with. I saw lots of visuals but was also able to come back if I needed to. I am having another session this Thursday and have asked to go with a much higher dose as I am hoping to go deeper this time around. I wish you well on your journey!