Babyfat- for the record, ketamine is sort of frowned upon here because, of all the popular psychedelics and disassociatives, it has some of the worst issues with dependencies and toxicity. That said, I'd like to share my experiences with it.
I've got considerable experience with LSD and shrooms, and had tried small bumps of K a few times. I'd never been impressed at all. But a friend of mine who is a true psychonaut encouraged me to try some larger doses. So under his guidance, over the course of a week, I ramped up gradually to about 3/4g, insufflated. At this dose you will not be able to move for the duration of the peak, which can last around an hour. Couldn't even pick up my bowl of weed, and speech was quite slurred. But the effects at this dosage can be profoundly psychedelic, equivalent to around 5-700ug of LSD, although different in many ways.
Firstly, it doesn't necessarily flood your inner eye with visual content like DMT or acid can, so we made a point of having great trippy videos on the whole time. This can be an incredible combination. Without the visuals it's easy to just end up feeling really drunk. Because its a tranquilizer, you can have this incredible peak without any of the jittery anxiety that LSD can generate. So during this friend's visit I had a handful of lovely peak psychedelic trips.
But there is a dark side: because of the ease of going back in without anxiety, the experience can be very seductive. I found myself having crackhead-style cravings all week in anticipation, which made me very uncomfortable. My wife even pointed out that I was behaving differently, not myself. That served as a warning- I like to keep a healthy balance in life- so after my friend left I never did K again.
It's known to be habit forming, and as it turns out this same friend (along with another longtime friend and fellow psychonaut) has really lost control. He's taking 2g per night, intramuscular, and seems to have forgotten about his Earthside concerns. So he's losing friends, losing opportunities, barely has a pot to piss in and is doing profound long term damage to his health. And in exchange for what? I've always felt that tripping is only worth a damn if you can integrate your experience in order to live a better life in the long periods between trips. Otherwise you are just escaping, which might as well be happening with alcohol or heroin. K is a seductress, warm and pleasant and full of empty promise.
I urge you to stay away... Maybe try a good 3G dose of shrooms next. They have way more to offer, and won't drag you down.