Posting to agree with House here. In my one experience with Ayahuasca, I definitely noted psychedelic effects while waiting 20 minutes to drink the chacruna tea.
At that dosage (50g, simmered 3x1h30 with vinegar (which I was later told is not necessary - actually by house himself

)) I felt very centered, watched from a detached perspective the flurry of thoughts and them being worked up, thought about all sorts of interesting stuff (about will, evolution, life, my life, etc).
There was a distinct hum in the background. I can't explain the sound in words, the best I can say is that subjectively it felt natural (as opposed to artificial).
While I didn't feel like it would be so, the moment I got up I realized my sense of balance was somewhat off, much like being drunk.
Finally, I also remember exploring the random visual noise that's usually there when you close your eyes and noticing that it had gained 3D-ness; Suddenly it was possible to zoom in and out, explore certain bits of the visual field, subjectively it had a sense of depth too.
So it may not be a bad idea at all, trying the Caapi alone for your first time. Personally, I made a note to explore it further without any admixture later down the road, as the effects of Caapi alone were quite intrinsic and enjoyable, albeit subtler than "classic" psychedelics (at that dose, can't speak of higher ones)