I will speak for my Changa experiences specifically, but this does find some echoes to my other psychedelic experiences from a longer time ago ~ ~ ~
i and ii) Society. We are not centered around translating deep sacred experiences anymore so there's a giant gap between the meaningfulness and truth that has been lived and the way humans run these days. When society don't provide ways for integration you have to find them elsewhere. There is a a great psychedelic community, vast galleries of artwork and valleys of sound waiting to be felt, an immense library of more or less ancient wisdom, creating a language in which to translate those experiences. Anonymous persons on the internet opened for the chat can help you through this. The reflex was to dive into that - being part of a subculture. Weirdly, getting more information was a way to integrate that overload of information I had received, decipher in a way.
More specifically with Changa, I was left as to: "How can I integrate something so beyond my perception, something impossible?". It gives birth to interesting learning, and I find her to be much about a sinking feeling, very subtle and in the background, but very much present for weeks/months after.
I have started drawing again and it has become a mean of translating those experiences in visions, in which I melt all of my daily life and experiences too. So it has invaded my life. You can be open and see it, a faint residual or just a feeling, everywhere. It has transformed my imagination and I perceive (and transform) the world and myself through that. It has become a transformation, but not in some grandiose way of big and clear understanding, it's more "sinking", a slow groove. An infusion. It's definitely weird, spiritual in a new sense - like "alright, there is this realm of Divine Imagination, why do people have not experienced it ... I want people to access this ... I can't really".
To make it shorter:
i) No providence of means for integration by mainstream society. Having to accept being transformed by something that both gets me closer to people but also distant in some other way from them (and the "ways" of society). Grounding the experience.
ii) Getting in touch with sub areas of cultures. Creating and accepting to change and trust the flow. Grounding the experience.