It's not only DMT but also harmala alkaloids which are MAOIs. It means you will not experience DMT effects but also DMT molecules breakdown will be slowed down. Also, major neurotransmitters and hormones like dopamine, serotonin, noradrenaline, and adrenaline are "simple" compounds with one primary amine. Harmala alkaloids will greatly increase time of effects from DMT and being reversible MAOIs they will add effects on their own.
I don't really know if you're aware of what you want to get into. If I were you, I would first start with DMT alone. Smoked or injected intramuscularly. (by the way, this drink of gods tastes like shit, terrible shit; of course the taste depends on plants used but it's just awful; I bet you will throw up and have diarrhea if you decide to prepare Ayahuasca)
It may be a great experience when you're ready but it also may be one big bad trip if you're
afraid (and I'm thinking - do you even know what you're afraid of? maybe you don't know what you should be afraid of

). Really, this is not straight DMT. You can compare it by simply taking DMT orally and then drinking Ayahuasca. You will know the difference. Anyway, I think this closeness of nature is just one big illusion, people believe what they set their minds to. I had better trips than after drinking Ayahuasca. And
gods forbid you find yourself in some circle of idiots wearing Indian clothes and singing some strange chants while drinking Ayahuasca... I mean ironically, I'm an atheist or maybe more precisely an agnostic atheist (I don't believe God or gods exist and I'm of opinion existence of any deity is unknowable).