No, I do believe you will need to first do a DMT-containing-plant extraction to make a batch of changa.
A required ingredient for changa is Freebase DMT which would need to first be isolated from the other alkaloids in the plant via extraction. Without isolating the DMT and extracting as Freebase you may as well just be smoking the powdered plant matter, which is ineffective and likely unpleasant.
If possible in some extraction teks you may be able to skip the final freebase crystallization step and go straight to dissolving the not-yet-crystallized freebase DMT into MAOI-containing-herbs. However, my reference point for this is the BLAB tek which would mean you still need to precipitate (salt?) out DMT Fumarate (generally for oral administration) from the D-Limo and would only be skipping the final step of a DMT Fumarate-to-Freebase conversion (which is essentially post-extraction).
Honestly, extraction teks aren't as difficult as they may appear at first glance. Fairly basic chemistry that can be done with readily available solvents, etc. Give it a go and you won't be disappointed. Just do a bit of research until you feel comfortable, if you have any questions you can always refer to the FAQ/Wiki/Search/or the DMT Nexus Community you're now a part of.
Welcome
Introduction Essays are great as well for letting us all get to know you and you're psychedelic history a bit better. Hope to see you around.
The inner soul is full of joy. Reveal my secrets and sew me whole. With each day, "I" heeds your call.
You may not care the slightest and may not be the brightest, but from here "I" sees you're mighty for you created it all.
And the jumbling sea rose above the wall.
Through this chaos comes the order you enthrall.