nobody is born knowing these things, making a thread and asking these questions is a good thing. Its important to be informed when having these experiences.
for dmt (the active ingredient in psychotria viridis) to be active orally, yes you need to take something together that inhibits an enzyme (MAO) which destroys the dmt in your guts. Since it Inhibits the MAO, its called a MAOI. In ayahuasca, the psychotria viridis is cooked with a vine, banisteriopsis caapi, which has a mixture of 3 MAOIs: Harmine, Harmaline and Tetrahydroharmine. 50g of caapi is a dose of MAOI. Also, any of those active principles I just mentioned, when taken separately. alone also work as a MAOI. The seeds of another plant, Syrian Rue (Peganum harmala) also have harmaline and harmine, so they can be used (3g of seeds).
I dont remember off the top of my head the dosage of harmine/harmaline/tetrahydroharmine by themselves, I think its generally around 200mg but someone here will tell better (or search the forum and you'll find)
In ayahuasca the vine and psychotria viridis are boiled together for a certain amount of time (some people do half an hour, others for hours and hours..), then pour off the water and keep it, add more water to the solids and boil again for same amount of time, and do this one more time, for a total of 3 times.. Then put the liquid together and throw away the solids, and on low fire boil down the liquid to a smaller amount (maybe 100mls per dose).
If using syrian rue, generally its recommended to boil it separately, drinking it half an hour before the psychotria viridis (also should be cooked same way). The same is true for taking the pure MAOIs, which are generally taken half an hour before the dmt-containing preparation. For the pure MAOIs, one could redissolve it in a bit of acidified (with a bit of lemon juice for example) warm water and then drink it.
as for smoking/drinking, each has its own characteristics. but one cannot smoke the psychotria leaves, one would have to extract the active principle, dmt, and then smoke the crystals in a bong, sandwiched between some herbs or just ashes. To extract there are several techniques, the easiest being an STB (straight-to-base). One needs a few chemicals but its not complicated, as long as one takes the safety precautions.
SWIM enjoys both smoking and taking orally. Did SWIY ever trip on something else (acid, mushrooms, mescaline)? SWIM wants to know because an explanation of what the trips are like depend if SWIY had psychedelic experiences and then SWIM can use a certain language with him, and if not, he has to adapt his words also