Hi & welcome @ the Nexus,
The 69Ron tek is meant for dry cactus STB.
If you want to work with fresh cactus you can look at the various A/B teks discussed on this forum.
I wouldn't recommend extracting peyote just for the psychedelic experience. You will be better of by consuming the cactus because in the TEK some of the active alkaloids other than mescaline will get lost.
Also you'll need quite some buttons so don't eat only 3-4 buttons especially if they are not aged yet. That's a waste because you probably only get threshold effects (if any).
And better not to harvest them from nature as they are getting extinct rapidly. Keeper Trout, a well known cacti expert also active on this forum, just posted this article about them placed on the red list:
https://www.dmt-nexus.me...spx?g=posts&t=51836
If you grew them yourself or bought them from a nursery and you have enough buttons the only thing I can say is:
Enjoy one of the best experiences a man can get

If you want to go for the extraction process to learn, better use San Pedro or other active Trichocereus species for that.