Did you read the book Meditation and the Bible?
If you do plan on any spiritual experience outside of Judaism, I would recommend seriously practicing meditation and visualization techniques described by Rabbi Aryeh Kaplan an others.
Only if you've been serious In a regiment in these (not just studying Kabbalah, but experiencing Jewish spirituality) and still want more would I recommend going to other places.
Specifically I would recommend (as an introduction) visions of a compassionate world by Menachem ekstien and then Visualization and imagery by Rabbi dov ber pinson.
Your debates about the concepts of Kabbalah is a different discussion to actually doing DMT. That's why I believe that it's important to have spiritual Jewish experiences first, putting aside a scholarly study in Kabbalah.
All in all, I'm still interested in what you would think if you do go ahead with it... It's just something that I wouldn't go for at this time.
I have it's sitting on the table near my bed, I've read every one of his books more then just once, and don't get me wrong I'm not looking for other spiritualities whatsoever, I'm fully grounded in my yiddishkeit completely, spiritually and philosophically, I'm not actively persuing anything outside yiddishkeit, just meditation which obviously we are both aware is a very Jewish concept as portrayed so clearly by Aryeh Kaplan.
BUT I would be lying if I told you at the end of the day the idea to ACTUALLY have a transcdental experience not a acid trip but a ligit out of body experience the likes of which ppl who almost die attest too (which can be induced at DMT clinic) is still something that excites and boggles my mind to no end, and although it's not practical I keep thinking to myself that one day when I pass through a country that happens to have such clinics, I aught to try for myself just once!
Maybe you've reached the advanced levels of meditation and can reach a transcdental state on your own, if, so lucky you!
But I have not mastered that yet, and until then, this idea of having a real life truly non-physical and unexplainable purely spiritual experience is something I envy!
Something about going through life the way it is, even the best parts of it, even an elated feeling of an intense Torah study session, or a real prayer done with full devotion, to me is still all considered mundane in comparison.
What should I do, It's just some sort of yearning feeling for something Devine and truly spiritual, not so easy to put into words I guess...
But no worries I'm not straying and going outside the religion I am totally grounded in my Judaism.