Those plants might be accessible but how accessible is the experience? The cactus requires a lot of material consumption and from my own experience and others even in this thread the trip is usually meh at most. Morning glories...that's a lot of seed to consume for an uncertain experience. Acacia...look, if they don't want to grow shrooms they're certainly not gonna go through a tek to get dmt from acacia bark.The best friend you will have is the internet. Do some digging around and you might have some luck.
There are several psychedelics that are much more accessible than you might think. Lots of people grow plants not knowing they contain schedule 1 drugs. Trichocereus, morning glories, some acacias...
Those things are cool, but for someone looking to trip - I dunno...not so much imo.