From what I can gather, the seeds are the most potent/dangerous part of the datura plant, so maybe start with a different part. And only a tiny dose so you can test the effects. The trouble with plants is they can contain unknown amounts of the active alkaloids: one plant may have little to no atropine/scopolamine while another might have an overdose. So always assume there's an overdose in whatever you're ingesting.
I happen to like the effects of SOME anticholinergic substances such as Bentyl (dicyclomine), an IBS drug. It dries out your eyes, speeds up your heart & makes you feel stoned... sorta like a stimulating weed high. Music sounds fucking amazing on it. But if you take even 1/4th too much of a pill, the dizziness & blurred vision sets in & it's no longer fun. I imagine that's what datura is like to a certain extent.
My sister wore a scopolamine patch for 3 days once after a surgery & got stuck with intense light sensitivity, vertigo & nausea for nearly a week when she removed the patch so there's definitely a dark side even if you don't die. And my grandpa developed glaucoma after using an ulcer drug that contained atropine--another datura alkaloid.