Yeah, you can make it longer by making
changa and vaping it which may roughly double the length of the experience and have a gentler onset.
Or, you can make
pharmahuasca which you consume orally - this will last several hours.
Or, you can make and consume ayahuasca, which is a brew made from the various alkaloid containing plants - this is the most traditional method and will last several hours.
The trees spoke to me through the wind. The more I listened, the more they spoke.