Dmt is what makes people have the white light experience at death, by the way, so I fucking WANT some!
I can-t help with where to get it (I used to get it years ago from a 'chemist' who was making it), but I can tell you it's not the white light that you'll see.
But you will see a myriad of colors that you'we never seen before, even on LSD or mushrooms (the predominant color is emerald green).
You will also see incredible otherworldly patterns dancing in front of your eyes, and even entities.
Everything will seem crystal clear for 5 minutes, you will understand how much importance we give to unimportant things.
DMT is produced by our brains in the moment of death, yes, but no white light or angels... more like a portal to another dimension.
Extracting it yourself is quite complicated, unless you're experienced in such issues.
I had bought the mimosa root powder from which it's made, I had all the money to buy anything needed, watched the you-tube videos, and I still couldn't do it.
It's very touchy.