Incredible write up brother! When I first began learning of ayahuasca, shamanism and the dmt experience I always envisioned trekking into the amazon to take part in one of these ceremonies but over the years I have pretty much come to the same conclusion as you have; that it is an experience in itself but you cannot ignore important dietary requirements, contraindications from prescription meds and general health and wellbeing at the expense of trying to have a traditional, more "legitimate", aya experience.
The amazon is not my culture. I think it's only natural to have an inclination that says *this* is what I need, this will be different, this is what I'm looking for, this is was it'll take to push me off the fence so to speak. But imo, it doesn't matter whether you are an inhabitant of the amazon or a city dweller, psychedelic substances should be taken in the safest and most comfortable environments as possible - wherever this place is for you.
Edit: And I loved your drawings!