Welcome to the Nexus!
As others have said, you can already share the experience
Regarding whether "natural" altered state experiences have anything to do with DMT or not, it's hard to say. I know DMT is a substance that is getting famous and people like to think it plays important part in such experiences, but there are other possibilities. Apart from DMT, we have many other compounds as a normal part of our metabolism which could, if concentrated enough, alter our consciousness. We have natural opiate-agonists, cannabinoids like anandamide, stimulants like dopamine, even more potent tryptamines like 5-meo-dmt and bufotenine, beta carbolines, etc.
And then, without even talking about specific neurotransmitters and endogenous drugs, the activation of different parts of the brain through different kinds of stimulation (magnetic waves, visualization techniques, etc) can also cause altered states.
It's certainly a fascinating subject