Ayahuasca is very potent, can last for hours and depending on the way you prepare it, can give, as the brazillian people say: "peia", which is an expression which translates to "get beaten up" by it.
I would advise the supersivion of an experienced shaman.
Best to take a small sample and do crude tests... I take 60ml and do a very crude extraction of the harmalas via wash soda and weigh so I know harmala content and you can also do a similar test with the dmt content after the harmalas are precipitated you can add a little more wash soda so ph around 11.7-12 and add like a few ml of hexan (doesn't even need to be best quality since just to test content) evaporate rather than freeze and weigh it. should give you a very good idea on content and how much you need to dose.I know, Varallo. I'm just advising that nowadays there are many people trying to make Ayahuasca with no or little supervision.
It really is complicated to people to get it right out of the blue.
Chances are you are going to prepare a very light or a very strong tea.
Yeah with dried caapi id do the same. That stuff is the hardest to home brew. Well least practical anyway.I use pressure cooker to cook shredded caapi and do 3-4x 1h pulls. With mimosa its not suggested since you get the sludge the others mention. With psychotira I've not yet had this issue. Powdered caapi and psychotria would be a pain to filter and even may cause some issues with clogging the vent.