Opinions - SWIM wonders what is the easiest way of journeying on cactus?

[RoboShindo]

SWIM has the internet available to him as well as the shops found in England and wishes to try a cactus based trip, he'd rather not go to the hassle of performing a mescaline extraction and wondered what, otherwise, would be the best way to experience such a trip? Should SWIM try garden centres or is purchasing online the best way? And also, how old must a Peyote cactus be to be of use for such a thing? SWIM is sorry to sound such a newb to this, it's just there is a lot of information to try and digest and so many various ways of trying this trip it's hard to decide where is the right place to start.