How cool! If you have the opportunity have a talk with the guys at the smartshop When Nature Calls located at Keizergracht 508 (you can say Alex sent you there).
I used to work there and they are not going to try to 'close the sell'. In fact they are instructed to not sell mushrooms for people who are are deeply misinformed or unprepared for the experience.
Amsterdam is a great city to have a psychedelic experience safely. There are many public parks where you cantrip comfortably and also some indoor spaces specially designed for tripping, like the Kokopeli smartshop.
Gave a very good trip and thanks for reading and commenting!