Ketamine is technically considered to be a non-classical psychedelic, meaning that derives its effects through different mechanisms instead of coming primarily through acting on the 5-TH2 receptors. It's also categorized as a dissociative.
I'm aware that the effects would likely be more dissociative, but I don't know much about what it's like outside of that. I'm not that interested in using ketamine, or dissociatives in general, so I never bothered to look that much into it. The only non-classical psychedelic that I find myself somewhat interested in trying is MDMA, but even then I haven't done much research on it.
Also, I've done shrooms before so I'm well aware of what they are like, lol (my first trip was a fucking disaster but most of my other ones were fine). Sounds very different from shrooms.